Answer:
its cos:48/80
Step-by-step explanation:
cos-1(48/80)=53.13
For this case we have by definition of trigonometric relations that the cosine of an angle is given by the leg adjacent to said angle on the hypotenuse of the triangle. So:
[tex]Cos (Y) = \frac {64} {80} = \frac {32} {40} = \frac {16} {20} = \frac {8} {10} = \frac {4} {5}[/tex]
After simplifying we have to:
[tex]Cos (Y) = \frac {4} {5}[/tex]
ANswer:
[tex]Cos (Y) = \frac {4} {5}=0.8[/tex]
Determine whether the function f(x) = 3(x − 1)4 is even or odd.
Answer:
Other answer.
Step-by-step explanation:
[tex]f(x) = 3(x-1)^4\\ f(-x) = 3(-x-1)^4 = 3\big(-(x+1)\big)^4 = 3(x+1)^4 \\ \\ f(-x)\neq f(x) \\ f(-x)\neq -f(x)\\ \\ \Rightarrow \text{The function is neither odd or even}[/tex]
Answer:
The function is neither even nor odd.
Step-by-step explanation:
Given : Function [tex]f(x)=3(x-1)^4[/tex]
To find : Determine whether the function is even or odd ?
Solution :
Rules to determine the function is even or odd :
If f(x)=f(-x) then the function is even.
If f(x)=-f(x) then the function is odd.
Now, Test for even function
[tex]f(x)=3(x-1)^4[/tex]
[tex]f(-x)=3(-x-1)^4[/tex]
[tex]f(-x)=3(-(x+1)^4[/tex]
[tex]f(-x)=3(x+1)^4[/tex]
[tex]f(x)\neq f(-x)[/tex] so function is not even.
Test for odd function,
[tex]f(x)=3(x-1)^4[/tex]
[tex]-f(x)=-3(x-1)^4[/tex]
[tex]f(x)\neq -f(x)[/tex] so function is not odd.
So, The function is neither even nor odd.
polygon ABCD is defined by the points A(-4,2), B(-2,4), C(1,3), and D(2,2). match the coordinates of the points you f the transformed polygons to their correct value
Answer:
D' ..................> (-2,2)
C'' .................> (3,-1)
A''' ................> (4,-2)
B'' .................> (4,2)
Step-by-step explanation:
Before we begin, we should remember the rotation rules:
1- Rotation 90° clockwise:
Coordinates (x,y) become (y,-x)
2- Rotation 90° counter clockwise:
Coordinates (x,y) become (-y,x)
3- Rotation 180° clockwise:
Coordinates (x,y) become (-x,-y)
4- Rotation 270° counter clockwise:
Coordinates (x,y) become (y,-x) ...........> same as rotation 90° clockwise
Now, let's consider the given problem:
1- Coordinates of D' if polygon ABCD rotates 90° counter clockwise to create A'B'C'D'
Original coordinates of point D are (2,2)
Rotation 90° counter clockwise means that the new coordinates will be (-y,x) which is (-2,2)
2- Coordinates of C'' if polygon ABCD rotates 90° clockwise to create A''B''C''D''
Original coordinates of point C are (1,3)
Rotation 90° clockwise means that the new coordinates will be (y,x) which is (3,-1)
3- Coordinates of A''' if polygon ABCD rotates 180° clockwise to create A'''B'''C'''D'''
Original coordinates of point A are (-4,2)
Rotation 180° clockwise means that the new coordinates will be (-x,-y) which is (4,-2)
4- Coordinates of B'' if polygon ABCD rotates 270° counter clockwise to create A''B''C''D''
Original coordinates of point B are (-2,4)
Rotation 270° counter clockwise means that the new coordinates will be (y,-x) which is (4,2)
Hope this helps :)
Laura's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Laura $5.50 per pound, and type B coffee costs $4.20 per pound. This month's blend used four times as many pounds of type B coffee as type A, for a total cost of $602.10. How many pounds of type A coffee were used?
A: 5.50/p
B: 4.20/p
total 602.10
ratio 1:4 =5
602.10 ÷ 5 =120.42
A= 120.42
(B= 120.42×4= 481.86)
120.42÷ 5.50= 21.8945.....
Answer: 27 pounds
Step-by-step explanation:
We know that Coffee A costs $5.50 per pound, Coffee B costs $4.20 per pound and that this month the total cost was $602.10, then:
[tex]5.50A+4.20B=602.10[/tex] (2)
We know that this month were used used four times as many pounds of type B coffee as type A, then:
[tex]B=4A[/tex] (1)
So, you need to substitute (1) into (2) and solve for A:
[tex]5.50A+4.20(4A)=602.10\\22.3A=602.10\\A=27[/tex]
About 30 million Americans attend classical music concerts . The average concertgoer attends 2.9 concerts per year . About how many tickets to classical concerts are sold each year
Answer:
87 million tickets are sold every year.
Step-by-step explanation:
Number of Americans attending classical music concerts:
30 million
Average number of times a spectator attends a concert in a year
2.9 times
Then the amount of tickets sold "x" for concerts of classical music in a year, will be equal to the number of people attending for the number of times they attend. So:
[tex]x= 30 * 2.9[/tex]
Where "x" is given in units of millions.
[tex]x = 87[/tex]
find the height of a cylinder with a volume of 1215pi mm and a radius of 9mm
Answer: the height would be 15
Step-by-step explanation:
v= pi*radius^2*height
1215pi mm= pi*9^2*height
1215pi mm= pi*81*height
(divide by pi on both sides, which isolates pi on both sides)
1215 mm= 81*height
(divide by 81 on both sides, which would isolate 81 on the right side of the equation)
1215/81= 15= height
The height of the cylinder is 15 mm.
Explanation:To find the height of a cylinder, we can use the formula for the volume of a cylinder, which is V = πr²h, where V is the volume, r is the radius, and h is the height.
Given that the volume is 1215π mm and the radius is 9 mm, we can plug these values into the formula and solve for h.
1215π = π(9)²h
Simplifying the equation, we have:
1215 = 81h
Dividing both sides by 81, we find:
h = 15 mm
Therefore, the height of the cylinder is 15 mm.
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What are the roots of the quadratic function in the graph?
A)-12
B)-4, 3
C)-4,-3
D)-3, 4
Answer:
D
Step-by-step explanation:
The roots are where the curve crosses the x-axis. So that's x=-3 and x=4.
Answer D.
Answer:
D
Step-by-step explanation:
The roots are the points on the x- axis where the function has a value of zero. That is where the graph crosses the x- axis
The graph crosses the x- axis at x = - 3 and x = 4, hence
Roots of the quadratic function are x = -3, 4 → D
Erin made 66 devilled eggs for a party. After an hour, there were 8 left. How many eggs were eaten in the first hour?
Hello There!
-What We Know-
Erin made 66 deviled eggs for a party.
After an hour 8 eggs were left.
X amount of eggs were eaten within the first hour.
——————————————————————————
We subtract 8 eggs how many were left after the hour
From how many eggs we had in total.
66-8=58.
58 eggs were eaten within the hour.
Answer:
58 eggs
Step-by-step explanation:
Use the geometric mean to find the seventh term in a geometric sequence if the 6th term is 6 and the 8th term is 216
A.)36
B.)106
C.)111
D.)176
Please please please help!!!
Answer:
A
Step-by-step explanation:
The geometric mean of 2 values a and b is [tex]\sqrt{ab}[/tex]
The 7 th term is the geometric mean of the 6 th and 8 th terms
Hence
[tex]a_{7}[/tex] = [tex]\sqrt{6(216)}[/tex] = 36 → A
Please Help!!! 50 Points!!!
In the first step of a proof, the left-hand side of the following identity is factored.
sin^2∅-cos^2∅sin^2∅=sin^4∅
The fundamental identity used in the second step of the proof is sin^2(θ) + cos^2(θ) = 1
An identity is true for general case, and not only for special cases. The proof for given statement is derived by using Pythagorean identity.
What are Pythagorean identities ?[tex]sin^2(\theta) + cos^2(\theta) = 1\\\\1 + tan^2(\theta) = sec^2(\theta)\\\\1 + cot^2(\theta) = csc^2(\theta)[/tex]
Given statement is [tex]\sin^2\theta - \cos^2\theta\sin^2\theta =\sin^4\theta\\\\[/tex]
Taking its left side:
[tex]\begin{aligned}\sin^2\theta(1 - cos^2\theta) &= \sin^2\theta \times sin^2\theta \\&= sin^4\theta \end{aligned}[/tex]
(from first Pythagorean identity).
Thus, the given statement is proved using Pythagorean identity (first) that [tex]sin^2\theta + cos^2\theta = 1\\[/tex]
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Find the distance between each pair coordinates. Select the correct answer. (-8, -8), (4, 8)
ANSWER
20 units.
EXPLANATION
We want to find the distance between (-8,-8) and (4,8).
We use the distance formula:
[tex]d = \sqrt{ {(x_2-x_1)}^{2} + {(y_2-y_1)}^{2} } [/tex]
We substitute the points into the formula to get:
[tex]d = \sqrt{ {(4 - - 8)}^{2} + {(8 - - 8)}^{2} } [/tex]
We simplify to get;
[tex]d = \sqrt{ {(12)}^{2} + {(16)}^{2} } [/tex]
[tex]d = \sqrt{144+ 256} [/tex]
[tex]d = \sqrt{400} [/tex]
[tex]d = 20[/tex]
The distance between the two points is 20 units.
Answer:
Distance = 20 units
Step-by-step explanation:
Points to remember
Distance formula
Length of a line segment with end points (x1, y1) and (x2, y2) is given by,
Distance = √[(x2 - x1)² + (y2 - y1)²]
To find the distance between give 2 points
Here (x1, y1) = (-8, -8) and (x2, y2) = (4, 8)
Distance = √[(x2 - x1)² + (y2 - y1)²]
= √[(4 - -8)² + (8 - -8)²]
= √[(4 + 8)² + (8 + 8)²]
= √[12² + 16²] = √[144 + 256)
= √400 = 20
Therefore distance = 20 units
Please please help me out
Answer:
x = 60°
Step-by-step explanation:
The measure of x is one- half the difference of the measures of the intercepted arcs.
The minor arc = 120°, hence
The major arc = 360° - 120° - 240°, so
x = 0.5(240 - 120) = 0.5 × 120° = 60°
Two lines that intersect at one point is an example of
Answer:
perpendicular lines
Step-by-step explanation:
The circumference of a circle can be found using the formula C=2*3.14r
Which is an equivalent equation solved for r?
C=2πr
C=πd
A=πr^2
r=C/2π
r=1/2 d
By the way all you do to solve r is:
C=2πr
C/2π=2πr/2π
C/2π=r
r=C/2π
Hope this helps:)
Predict how much money can be saved without having a negative actual net income. monthly budget budgeted amount actual amount income wages savings interest $1150 $25 $900 $25 expenses rent utilities food cell phone savings $400 $100 $250 $75 $200 $400 $80 $200 $75 $____ net income $150 $____
a. it is not possible to save any money this month without having a negative actual net income.
b. $170 can be saved resulting in an actual net income of $0.
c. $200 can be saved resulting in an actual net income of $150.
d. as long as you are saving money, you will not have a negative actual net income.
The amount of money that can be saved without having a negative actual net income is: $170 can be saved resulting in an actual net income of $0.
Explanation:Predict how much money can be saved without having a negative actual net income.
Monthly Budget (is an itemized list of expected income and expenses that helps you to plan how the money will be spent or saved and track of spending habits.)
Budgeted Amount (is an itemized allotment of funds, time for a given period)
Actual Amount (is the particular year in which the amount is spent)
Income (business receives in exchange to provide a good /service /through investing capital )
Wages (is monetary compensation paid by employer to employee in exchange for work done)
Savings Interest (is money the you earn in return for holding your savings in an account.)
$1150
$25
$900
$25
Expenses
Rent
Utilities
Food
Cell Phone
Savings
$400
$100
$250
$75
$200
$400
$80
$200
$75
$____
Net Income
$150
$____
How much money can be saved without having a negative actual net income?
a. It is not possible to save any money this month without having a negative actual net income. b. $170 can be saved resulting in an actual net income of $0. c. $200 can be saved resulting in an actual net income of $150. d. As long as you are saving money, you will not have a negative actual net income.Learn more about money brainly.com/question/1870710
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Answer:
$170 can be saved resulting in an actual net income of $0.
Step-by-step explanation:
NEED TO FIGURE THIS OUT RIGHT NOW CAN SOMEBODY PLEASE HELP ME? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find a quadratic equation with roots -1+4i and -1-4i
Answer:
c
Step-by-step explanation:
Given the roots are x = - 1 + 4i and x = - 1 - 4i then the factors are
(x - (- 1 + 4i))(x - (- 1 - 4i))
= (x + 1- 4i )(x + 1 + 4i )
= (x + 1)² - 16i² → [ i² = - 1 ]
Expand and simplify
= x² + 2x + 1 + 16
Hence
x² + 2x + 17 = 0 → c
A father and his son walked 240 meters. During this trip, the father made 100 fewer steps than did his son. Find the distance each one of them covers with one step, if the father’s step is 20 cm greater than his son’s step.
The answer is:
The father's step is 80 cm
The son's step is 60 cm.
Why?To solve the problem, we need to write equations in order to create a relation between the father's and son's steps, and the distance covered by them.
We know thay they covered 240 meters, and the father's step is 20 cm (0.2m)greater than his son's step, so, we can write the following relation:
[tex]NumberOfSteps_{Son}=\frac{240m}{x}[/tex]
and,
[tex]NumberOfSteps_{Father}=\frac{240m}{x+0.2m}[/tex]
Now, if the know that the father made 100 fewer steps than his son, we have:
[tex]NumberOfSteps_{Son}-100=\frac{240m}{x+0.2m}[/tex]
Then, substituting the first equation into the second equation, we have:
[tex]\frac{240m}{x}-\frac{240m}{x+0.2m}=100\\\\\frac{240m(x+0.2m)-240mx}{x(x+0.2m)}=100\\\\240mx+0.2m*240m-240mx=(x)(x+0.2m)*100\\\\48m^{2}=100*(x^{2}+0.2mx)=100x^{2} +20mx\\\\48m^{2}=100x^{2}+20mx\\\\100x^{2}+20mx-48m^{2}[/tex]
We have a quadratic equation:
[tex]100x^{2}+20mx-48m^{2}=0[/tex]
Where,
[tex]a=100\\b=20\\c=-48[/tex]
So, solving it applying the quadratic formula, we have:
[tex]\frac{-b+-\sqrt{b^{2} -4ac} }{2a}[/tex]
[tex]\frac{-20+-\sqrt{20^{2} -4*100*-48} }{2*100}=\frac{-20+-\sqrt{400+19200} }{200}\\\\\frac{-20+-\sqrt{400+19200} }{200}=\frac{-20+-\sqrt{19600} }{200}\\\\\frac{-20+-\sqrt{19600} }{200}=\frac{-20+-(140)}{200}\\\\x_{1}=\frac{-20+140}{200}=0.6\\\\x_{2}=\frac{-20-140}{200}=-0.8[/tex]
Then, since distance cannot be negative, we need to take the positive value, so, the son's step is 0.6m or 60 cm.
Now, calculating the father's step, we have:
[tex]FatherStep=SonStep+20cm\\\\FatherStep=60cm+20cm=80cm[/tex]
Hence, we have that the father's step is 80 cm.
Have a nice day!
The distance of the father and son will be 80cm and 60cm respectively.
How to calculate the distance?The number of son's step will be:
= 240/x
The number or father's step will be:
= 240/x + 0.2
Solving further, we'll have 100x² - 20mx - 48m² and using quadratic formula, this will be x1 = 0.6 and x2 = -0.8.
The son's step will be:
= 0.6 × 100 = 60cm
The father's step will be:
= 60cm + 20cm = 80cm
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Find the slope of the line graphed below.
It is 5/3 because it going up by 5 over by 3 hope this helps.
A realetor recieves 5% of the cost of every property he sells how much does the relator recieve for a property that sells for 50000
[tex]\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{5\% of 50000}}{\left( \cfrac{5}{100} \right)50000}\implies 500[/tex]
The realtor receives a 5% commission from the sale of a property. For a property sold at $50,000, the realtor's commission would be $2,500, calculated by multiplying the sale price by the commission rate.
To calculate the amount the realtor receives from the sale of a property when they earn a commission of 5%, you can use the following formula:
Commission = Sale Price * Commission Rate
In this case, the sale price of the property is $50,000 and the commission rate is 5%, which is 0.05 when expressed as a decimal.
Thus, the commission the realtor earns is calculated as follows:
Commission = $50,000 * 0.05
Commission = $2,500
Therefore, the realtor would receive $2,500 from the sale of a property that sells for $50,000.
PLEASE HELP! What are the values of w and x in the triangle below? Round the answers to the nearest tenth.
w = 13.3; x = 10.3
w = 10.8; x = 6.1
w = 13.3; x = 23.6
w = 10.8; x = 16.9
Answer:
Part 1) The value of w is 13.3 units
Part 2) The value of x is 10.3 units
The answer is the option
w=13.3, x=10.3
Step-by-step explanation:
see the attached figure with letters to better understand the problem
Part 1) Find the value of w
we know that
In the right triangle ABD
tan(42°)=12/w
Solve for w
w=12/tan(42°)=13.3 units
Part 2) Find the value of x
In the right triangle ABC
tan(27°)=12/(w+x)
(w+x)=12/tan(27°)=23.6 units
(w+x)=23.6 units
Solve for x
x=23.6-w
substitute the value of w
x=23.6-13.3=10.3 units
The measure of side lengths w and w are 13.3 and 10.3 units respectively.
The correct option is A) w = 13.3; x = 10.3
What are the measures of side length x and w?The figures in the image are those of two right triangles.
To solve for the measure of side length w and x, we use the trigonometric ratio:
First, we solve for side length w:
Angle θ = 42 degrees
Opposite to angle θ = 12
Adjacent to angle θ = w
tan(θ) = opposite / adjacent
tan( 42 ) = 12 / w
w = 12 / tan( 42 )
w = 13.3
Now we solve for side length x:
Angle θ = 27 degrees
Opposite to angle θ = 12
Adjacent to angle θ = ( w + x )
tan(θ) = opposite / adjacent
tan( 27 ) = 12 / ( w + x )
( w + x ) = 12 / tan( 27 )
( w + x ) = 23.55
Plug in w = 13.3
13.3 + x = 23.55
x = 23.55 - 13.3
x = 10.3
Therefore, the value of x is 10.3 units
Option A) w = 13.3 and x = 10.3 is the correct answer.
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What is the logarithmic function modeled by the following table?
x f(x)
8 3
16 4
32 5
Select one:
a. f(x) = logx2
b. f(x) = log2x
c. f(x) = 2 log10x
d. f(x) = x log102
Answer:
The logarithmic function modeled by the table would be
[tex]f(x)=log_{2} x[/tex]
So it would seem to be answer B.
This figure is made up of a triangle and a semicircle.
What is the area of the figure?
Use 3.14 for π
.
Enter your answer, as a decimal, in the box.
units²
Separate the shape into two figures, a semi circle and a rectangle. Find the area of each and add.
See attached picture:
Answer: The area of the figure is 29.13 sq. units.
Step-by-step explanation: We are given to find the area of he figure shown in the graph.
The figure is made up of a triangle and a semi-circle.
Let us divide the figure into two parts, triangle ABC with base BC and altitude AD and the circle with diameter BC as shown in the attached image below.
From the graph, we note that
AD = 5 units and BC = 6 units.
Since BC is the diameter of the semicircle, so its radius will be
[tex]r=\dfrac{1}{2}\times BC=\drac{1}{2}\times6=3~\textup{units}.[/tex]
So, the area of the semicircle is given by
[tex]A_{sc}=\dfrac{\pi r^2}{2}=3.14\times \dfrac{3^2}{2}=3.14\times 4.5=14.13~\textup{sq. units}.[/tex]
Also, the area of the triangle ABC is given by
[tex]A_t=\dfrac{1}{2}\times AD\times BC=\dfrac{1}{2}\times5\times6=15~\textup{sq. units}.[/tex]
Therefore, the total area of the figure will be
[tex]A=A_{sc}+A_t=14.13+15=29.13~\textup{sq. units}.[/tex]
Thus, the area of the figure is 29.13 sq. units.
1. Find sinθ if cosθ=1/2 and θ terminates in Quadrant IV.
2. Find cosθ if sinθ=(√2)/2 and θ terminates in Quadrant I.
3. Find tanθ if cosθ=-1/2 and θ terminates in Quadrant II.
4. Find tanθ if sinθ=-1 and 0≤θ<2π radians.
Answer:-(√3)/2, (√2)/2, -√3, and undefined
Step-by-step explanation:
There are two ways you can solve this. One is with the Pythagorean identity:
sin²θ + cos²θ = 1
The other way is by knowing your unit circle.
1. From the unit circle, we know that cos θ = 1/2 at θ = π/3 and θ = 5π/3. Since θ is in Quadrant IV, then θ = 5π/3. sin (5π/3) = -(√3)/2.
We can check our answer using the Pythagorean identity:
sin²θ + cos²θ = 1
sin²θ + (1/2)² = 1
sin²θ + 1/4 = 1
sin²θ = 3/4
sin θ = ±(√3)/2
Since sine is negative in Quadrant IV, sin θ = -(√3)/2.
We can repeat these steps for the other questions.
2. sin θ = (√2)/2 at θ = π/4 and θ = 3π/4. Since θ is in Quadrant I, θ = π/4. Therefore, cos θ = (√2)/2.
3. cos θ = -1/2 at θ = 2π/3 and θ = 4π/3. Since θ is in Quadrant II, θ = 2π/3. Therefore, sin θ = (√3)/2, and tan θ = sin θ / cos θ = -√3.
4. sin θ = -1 at θ = 3π/2. Therefore, cos θ = 0. tan θ = sin θ / cos θ, so tan θ is undefined.
1. sinθ = √3/2, 2. cosθ = √2/2, 3. tanθ = -√3, 4. tanθ is undefined.
Explanation:1. Given that cosθ=1/2 and θ terminates in Quadrant IV, we can use the Pythagorean identity sin^2θ + cos^2θ = 1 to find sinθ. Substitute the value of cosθ into the equation: sin^2θ + (1/2)^2 = 1. Solve for sinθ: sinθ = ± √(1 - (1/4)) = ± √(3/4) = ± √3/2. Since θ terminates in Quadrant IV, sinθ is positive. Therefore, sinθ = √3/2.
2. Given sinθ=(√2)/2 and θ terminates in Quadrant I, we can again use the Pythagorean identity sin^2θ + cos^2θ = 1 to find cosθ. Substitute the value of sinθ into the equation: (√2/2)^2 + cos^2θ = 1. Solve for cosθ: cosθ = ± √(1 - (1/2)). Since θ terminates in Quadrant I, cosθ is positive. Therefore, cosθ = √(1 - (1/2)) = √(1/2) = 1/√2 = √2/2.
3. Given cosθ=-1/2 and θ terminates in Quadrant II, we can find sinθ using the Pythagorean identity sin^2θ + cos^2θ = 1. Substitute the value of cosθ into the equation: sin^2θ + (-1/2)^2 = 1. Solve for sinθ: sinθ = ± √(1 - (1/4)) = ± √(3/4) = ± √3/2. Since θ terminates in Quadrant II, sinθ is positive. Therefore, sinθ = √3/2. Now, we can find tanθ using the relationship tanθ = sinθ / cosθ. Substitute the values of sinθ and cosθ into the equation: tanθ = (√3/2) / (-1/2) = -√3.
4. Given sinθ=-1 and 0≤θ<2π radians, we can find cosθ using the Pythagorean identity sin^2θ + cos^2θ = 1. Substitute the value of sinθ into the equation: (-1)^2 + cos^2θ = 1. Solve for cosθ: cos^2θ = 1 - 1 = 0. Since 0^2 = 0, cosθ = 0. Now, we can find tanθ using the relationship tanθ = sinθ / cosθ. Substitute the values of sinθ and cosθ into the equation: tanθ = -1 / 0 = undefined.
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Please help me with this
Answer:
13.7 cm²
Step-by-step explanation:
area of yellow region = area of square - area of 4 quarter circles
area of square = 8² = 64
area of 4 congruent quarter circles = area of circle
area of circle with radius = 4
A = π × 4² = 16π
yellow region = 64 - 16π ≈ 13.7 cm²
Given the function y = x^4- 8x² + 16.
On which intervals is the function increasing?
A. Empty set
B. (-infin, infin)
C (-infin, -2) and (0,2)
D. (-2,0) and (2, infin)
Answer:
Step-by-step explanation:
Recall that we use the first derivative to discover where a function is increasing or decreasing; it's increasing where the first derivative is + and decreasing where the first derivative is -.
The derivative of y = x^4 - 8x^2 + 16 is dy/dx = 4x^3 - 16x, or 4x(x^2 - 4).
This can be factored further: 4x(x - 2)(x + 2).
Set this equal to zero and solve for the three critical values:
{-2, 0, 2}.
Set up a total of four intervals: (-∞, -2), (-2, 0), (0, 2), (2, ∞).
Now choose a test point within each interval: {-3, -1, 1, 3}.
Evaluate the first derivative, dy/dx, at each of these four test points. Rule: if the first derivative is +, we know the function is increasing on that interval; if -, the function is decreasing.
At x = -3, dy/dx = 4x(x - 2)(x + 2) becomes (-)(-)(-), which is -, so we know that the function is decreasing on interval (∞, -2).
At x = -1, dy/dx is (-)(-)(+), which is +, so we know that the function is increasing on (-2, 0).
At x = 1, dy/dx is (+)(-)(+), which is -, so we know that the function is decreasing on (0, 2).
Finally: at x = 3, dy/dx is (+)(+)(+), so we know that the function is increasing on (2, ∞ ).
What is the value of x if 3x - 6 = 21 ?
Hello There!
X=9
If we substitute X in this equation, it would say 3*9 which equals 27 subtract 6 and you get 21 which is true.
the value of x that satisfies the equation 3x - 6 = 21 is x = 9.
To find the value of x in the equation 3x - 6 = 21, we need to isolate the variable x on one side of the equation. We can do this by performing inverse operations.
First, we add 6 to both sides of the equation to cancel out the -6 term: 3x - 6 + 6 = 21 + 6, which simplifies to 3x = 27.
Next, we divide both sides of the equation by 3 to isolate x: (3x)/3 = 27/3, resulting in x = 9.
Therefore, the value of x that satisfies the equation 3x - 6 = 21 is x = 9. When we substitute x = 9 back into the equation, we get 3(9) - 6 = 21, which simplifies to 27 - 6 = 21, confirming that x = 9 is indeed the correct solution.
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Mary needs to buy 44 cookies for her party.If 6 cookies come in a package how many packages of cookies does she buy
Answer:
She needs to buy 8 packages.
Step-by-step explanation:
Divide 44 (cookies) by 6 (cookies in package) to get 7.33 (packages). Since you can't buy 7.33 packages, you will have to buy 8. Hope this helps!
Double check my Math Question?
Evaluate the dot product (2, 4) and (1, -2)
My answer comes out (2, 2), is that right?
Answer:
-6
Step-by-step explanation:
You are finding the dot product of vectors <2, 4> and <1, -2>. Recall that the dot product is a SCALAR. In this case <2, 4> · <1, -2> = 2(1) + 4(-2)>, or
2 - 8, or -6.
The equation of a parabola is given.
y=-1/12x^2 - 2x-1
What are the coordinates of the focus of the parabola?
Enter your answer in the boxes.
ANSWER
(-12,8)
EXPLANATION
The equation of the parabola is given as:
[tex]y = - \frac{1}{12} {x}^{2} - 2x - 1[/tex]
We can rewrite this in the vertex form as:
[tex] {(x + 12)}^{2} = - 12(y - 11)[/tex]
This implies that
[tex]4p = 12[/tex]
p=3
The vertex of this parabola is (-12,11)
The focus is
(-12,11-3)
=(-12,8)
Answer: -12, 8
Step-by-step explanation:
.
Construct a scatterplot and identify the mathematical model that best fits the data. Assume that the model is to be used only for the scope of the given data and consider only linear, quadratic, logarithmic, exponential, and power models. Use a calculator or computer to obtain the regression equation of the model that best fits the data. You may need to fit several models and compare the values of R2.
The table below shows the weight of crops of oranges and the resulting gallons of juice. Using the weight as the independent variable, find the regression equation of the best model.
y = –13.07 + 0.079x
y = 264.43 e1.0001x
y = 0.079x0.998
y = –7511.9 + 923.99 ln x
To find the best fit model for the given data, draw a scatterplot and fit the models given. For each model, calculate the regression equation and R-squared value. Compare the R-squared values, the model with the highest value is the best fit.
Explanation:To construct a scatterplot and identify the mathematical model that fits the data, first plot the points of weight and gallons of juice on a graph, with weight as the x-coordinate (independent variable) and juice as the y-coordinate (dependent variable). Next, try to draw each of the models given (linear, exponential, power and logarithmic) through the data points.
For each model, you'll need to calculate the regression equation and the R-squared value. The R-squared value is a statistical measure that shows the proportion of variance for a dependent variable that's explained by an independent variable. It ranges from 0 to 1, with 1 indicating a perfect fit.
After this, you should compare the R-squared values of different models. The model giving the highest R-squared value would be the best fit for your data. This model's regression equation will be the most accurate for the prediction of the dependent variable over the scope of your data.
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The best mathematical model that fits the given data is a linear model. The regression equation is y = -13.07 + 0.079x
Explanation:To find the regression equation of the best model, we need to compare the values of R2 for different models. Let's start by constructing a scatterplot using the given data:
To solve this, you need to input the data points of the x (pounds of oranges) and the y (gallons of orange juice) into a calculator or statistics software to calculate the best regression model fit. The data points are 4321, 5012, 5239, 5366, 8978, 25413 for x and 341.3, 391.5, 399.6, 417.2, 656.1, 1927.3 for y.
From the scatterplot, we can see that the data points form a linear pattern. Therefore, the best mathematical model that fits the data is a linear model. Using a calculator or computer, we can find the regression equation:
y = -13.07 + 0.079x
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HELP PLEASE!! I DON'T UNDERSTAND!!
It should be 40 degrees
Answer:
60 deg
Step-by-step explanation:
The measure of angle LPM is the sum of the measures of arcs LM and KN divided by 2.
m<LPM = (40 + 80)/2 = 60
Answer: m<LPM = 60 deg