For this case we have the variable [tex]x = -3[/tex]:
[tex]A) 6x = 6 (-3) = - 18\\B) 4x = 4 (-3) = - 12\\C) -3x = -3 (-3) = + 9\\D) -7x = -7 (-3) = + 21[/tex]
Now, matching each expression with its value we have:
A goes with 4
B goes with 3
C goes with 2
D goes with 1
ANswer:
A goes with 4
B goes with 3
C goes with 2
D goes with 1
50 points!!! Please help!!!
Two variables are correlated with r=−0.31.
Which answer best describes the strength and direction of the association between the variables?
weak positive
weak negative
strong negative
strong positive
The r value is a number between -1 and +1.
For a negative value, the closer to -1 it would be a strong negative, if it is closer to 0, it would be a strong negative.
-0.31 is closer to 0 than -1, so it would have a strong negative association.
Sophie was mixing her favorite shade of purple paint. The paint requires 1/3 cup of blue for every 1/2 cup of red paint
What segment is the projection of QT on RT?
A) RS
B) ST
C) UT
Answer:
The correct answer option is ST.
Step-by-step explanation:
We are given a figure of a right angled triangle and we are to determine whether which of the given segments is the projection of QT on RT.
We know that:
QT = QS + ST
Therefore, on RT, ST is the projection of QT since it comes mid way from Q to T.
So the correct answer option is ST.
Answer:
ST is the projection of QT on RT
Step-by-step explanation:
To Find : What segment is the projection of QT on RT?
Solution:
We are supposed to find the projection of QT
In the projection
We draw a perpendicular on RT with point Q
So, Perpendicular on RT is QS
So, ST is the projection of QT on RT
So, Option B is true
Hence ST is the projection of QT on RT
St. Louis, Missouri and Washington, D.C. Have very similar latitudes. (Latitude measures how far north or south a place is, which in turn affects the temperature.) The box plots below show the daily high temperatures (in degrees Celsius) that were recorded during July 201320132013 in each city. Which pieces of information can be gathered from these box plots?
Answer:
The Answer is multiple choice and the answer is B. Only B.
Step-by-step explanation:
The Answer is multiple choice and the answer is B.
We have given that,
St. Louis, Missouri, and Washington, D.C.
Have very similar latitudes. (Latitude measures how far north or south a place is, which in turn affects the temperature.)
What is the latitudes?The latitude is specified by degrees, starting from 0° and ending up with 90° to both sides of the equator, making latitudes Northern and Southern.
The box plots below show the daily high temperatures (in degrees Celsius) that were recorded during July 201320132013 in each city.
The pieces of the information that can be gathered from these box plots are option is B.
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The current flowing through an electric circuit is the derivative of the charge as a function of time. If the charge q is given by the equation q(t)=3t^2+2t-5 what is the current at t = 0?
Answer:
The current at t = 0 is
[tex]I (0) = 2[/tex] units of current
Step-by-step explanation:
If the current flowing through an electric circuit is defined as the derivative of the charge as a function of time and we have the equation of the charge as a function of time, then, to find the equation of the current, we derive the equation of the charge.
[tex]q (t) = 3t ^ 2 + 2t-5[/tex]
[tex]\frac{dq(t)}{dt} = 3 (2) t ^ {2-1} +2t ^ {1-1} -0[/tex]
Simplifying the expression we have:
[tex]\frac{dq(t)}{dt} = 6t + 2t ^0\\\\\frac{dq(t)}{dt} = 6t + 2 = I (t)[/tex]
Finally, the equation that defines the current of this circuit as a function of time is:
[tex]I (t) = 6t +2[/tex]
Now to find the current at t = 0 we make [tex]I (t = 0)[/tex]
[tex]I (0) = 6 * 0 +2[/tex]
[tex]I (0) = 2[/tex] units of current
Three people play a game on each spinner in the previos problem.
* Player 1 scores a point if the pointer lands on 1.
* Player 2 scores a point if the pointer lands on 2.
* Player 3 scores a point if the pointer lands on 3.
a. On which spinner(s) is the game a fair game? Explain.
b. Choose a spinner that you think doesn't make a fair game. Then, change the scoring rules to make the fair by assigning different points for landing on different numbers. Explain why your point system works.
Answer:
Step-by-step explanation:
All other things being equal, spinner A is fine. It is a fair spinner.
Spinner B is not fair. Players 1 and 3 have only 1 number each. Player 2 on the other hand, has 2 numbers that work for him. If player 2 puts in two dollars and players 1 and 3 one dollar each, that should even up the odds. Now you want it just to be fair. So I think player 2 has to put up 2 dollars and players 1 and 3 each put up one. The pot is 4 dollars each time it is played.
Spinner 3 is not fair either. Player one has 2 chances. Player 2 has 3 chances and player 3 has but one chance. There are 6 chances in all. Player 1 should put up 2 dollars to play player 1 should put up 3 dollars and player 1 should put up 1 dollar.
The play cost $2,600.00 to produce, and they intend to sell tickets for $10 each. After the play, Betsy will take the ticket proceeds and deposit them with the bank. If 741 people attend the play's opening night, what will the balance of the bank account be? A. $7,410 B. $10,010 C. - $2,526 D. $4,810
Answer:
4,810
Step-by-step explanation:
$10 per ticket times 741 people (10 * 741) is 7,410, then subtract the cost to produce the play, 7,410 - 2600 = 4,810.
What is the correlation coefficient r for the data set? Enter your answer to the nearest hundredth in the box. r =
x y
0 8
1 7.5
2 6
2 5.5
3 5.5
3 4
4 3
5 3
6 2.5
Answer:
-0.00348
Step-by-step explanation:
x y xy [tex]x^2[/tex] [tex]y^2[/tex]
0 8 0 0 64
1 7.5 7.5 1 56.25
2 6 12 4 36
2 5.5 11 4 30.25
3 5.5 16.5 9 30.25
3 4 12 9 16
4 3 12 16 9
5 3 15 25 9
6 2.5 15 36 6.25
Now [tex]\sum x=0+1+2+2+3+3+4+5+6=26[/tex]
[tex]\sum y=8+7.5+6+5.5+5.5+4+3+3+2.5=45[/tex]
[tex]\sum (xy)=0+7.5+12+11+16.5+12+12+15+15=101[/tex]
[tex]\sum x^2=0+1+4+4+9+9+16+25+36=104[/tex]
[tex]\sum y^2=64+56.25+36+30.25+30.25+16+9+9+6.25=257[/tex]
N = number of pairs of scores = 9
Formula :[tex]r =\frac{N\sum(xy)-\sum x \sum y}{(N \sum x^2 -(\sum x)^2)(N \sum y^2 -(\sum y)^2)}[/tex]
Substitute the values.
[tex]r =\frac{9(101)-(26 \times 45)}{(9 (104) -(26)^2)(9(257) -(45)^2)}[/tex]
[tex]r =-0.00348[/tex]
Hence the correlation coefficient is -0.00348
The value of Correlation coefficient is -0.00348.
What is a Correlation Coefficient?A correlation coefficient denotes the strength of the relation between two variables of a function.
The formula for correlation coefficient is
[tex]\rm r = \dfrac{ N \sum (xy) - \sum x \sum y}{(N \sum x^2- (\sum x)^2)(N\sum y^2 - (\sum y)^2}[/tex]
The data is
x y
0 8
1 7.5
2 6
2 5.5
3 5.5
3 4
4 3
5 3
6 2.5
the value of ∑x = 26
∑y = 45
∑(xy) = 101
∑x² = 104
∑y² = 257
N = Total frequency = 9
The value of r is obtained by substitution of value in the equation.
r = -0.00348
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Which equation most closely represents the line of best fit for the scatter plot below?
I think that the first choice is the correct one
Please help me out with this please
The area of a circle is
[tex]a = r {}^{2} \pi[/tex]
So we get
[tex]a = 2.5 {}^{2} \pi[/tex]
so we get 19.6 rounded to the nearest tenth
Now we subtract that from the area of the square which is 25
We get 5.4
So the answer shoild be 5.4ft
Hopefully this is correct and helps you!
Answer:
5.4 ft²
Step-by-step explanation:
The area of the yellow region = area of square - area of circle
area of square = 5² = 25
note that the diameter of the circle = 5, thus radius = 2.5
area of circle = π × 2.5² = 6.25π
yellow region = 25 - 6.25π ≈ 5.4 ft²
Find the value of the indicated angles. HELP PLEASE!!
Answer:
52
Step-by-step explanation:
add add add add add add adddaddd addda
The inscribed angle is half that of the arc it comprises. The measure of both the angle is 52°.
How do we relate the inscribed angle and the arc?we know that the inscribed angle is half that of the arc it comprises.
Here, the arc that the inscribed angles comprise is the same.
2(3m+2)° = (4m+20)°
Solve for m
6m + 4 = 4m + 20
6m - 4m = 20 - 4
2m = 16
m = 8
To find the measure of the angle
(4m+20)°= 4(8) + 20 = 52°
2(3m+2)° = 2(26) = 52
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You have a large tree in your front yard. At noon the tree casts a circular shadow with a radius of 9 m. You are now planting a tree in your back yard. At noon it's shadow will have a radius of 4 m. How much of your yard is shaded by the two trees at noon?
Answer:
97π m² ≈ 304.7 m²
Step-by-step explanation:
The area of a circle is given by the formula ...
A = πr²
The sum of the areas of the two circles is ...
A = π(9 m)² + π(4 m)² = π(81 +16) m²
= 97π m² ≈ 304.7 m²
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Answer:
okay
Step-by-step explanation:
An object is launched into the air. The projectile motion of the object can be modeled using the function h(t) = –16t2 + 72t + 5, where t is the time in seconds since the launch and h(t) represents the height in feet of the object after t seconds. What is true about the projectile motion of this object? Check all that apply. The initial height is 5 feet. The initial velocity of the object is –72 feet/second. The object will hit the ground after approximately 4.57 seconds. After 3 seconds, the object is 173 feet high. At t = 0, h(t) = 0.
Answer:
Step-by-step explanation:
In the equation, 72t represents the initial upwards velocity and 5 represents the initial launching height. The leading term represents the pull of gravity on the object in the English system of measurement.
So the first question says the initial height is 5 feet. TRUE
The second question says the initial vertical velocity is -72. FALSE (it's positive 72 ft/sec)
The third question says that the object will hit the ground after approximately 4.57 seconds. TRUE. Find this by setting the h(t) on the left equal to 0, since this is the height at any time during the flight. When h(t) = 0, that means that there is NO height, which means the object is on the ground. Set the equation equal to 0 and factor to find t. Putting that into the quadratic formula gives you t values of -.068 and 4.57. Since the 2 things in math that will NEVER EVER be negative are distances and time, we can safely disregard the negative t value and go with t = 4.57.
The fourth question says that after t = 3 seconds, the object is 173 feet high. FALSE. Find this by subbing in a 3 for every t in the equation.
[tex]h(3)=-16(3)^2+72(3)+5[/tex]
This gives you that h(3) = 77 feet
The last question says that at t = 0, h(t) = 0. FALSE again. Sub in a 0 for every t in the equation, and you get h(0) = 5, which is the initial launching height.
Answer:
The initial height is 5 feet.
The object will hit the ground after approximately 4.57 seconds.
A & C
Step-by-step explanation
An object is launched into the air. The projectile motion of the object can be modeled using the function h(t) = -16t^2 + 72t + 5, where t is the time in seconds since the launch and h(t) represents the height in feet of the object after t seconds
General equation is
V_0 is the initial velocity
h_0 is the initial height
From the given equation , the initial height is 5 feet
Initial velocity is +72 feet / sec
When the onbject hits the ground, the height becomes 0
So we plug in 0 for h(t) and solve for t
USe quadratic formula to solve for t
a=-16, b= 72, c= 5
t= -0.06 and t= 4.568
The object will hit the ground after approximately 4.57 seconds.
To find out the height after 3 seconds, plug in 3 for t
At t=0 , h(0) = 5
Please help me out with this
Answer:
(7, - 4) and r = 7
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
(x - 7)² + (y + 4)² = 49 ← is in standard form
with (h, k) = (7, - 4 ) and r = [tex]\sqrt{49}[/tex] = 7
Find an equation for the nth term of the sequence.
-1, -4, -16, -64
a. an = -1 • 4^n - 1
b. an = -1 • 4^n
c. an = 4 • -1^n
d. an = 4 • -1^n + 1
Answer:
a. an = -1 • 4^(n - 1)
Step-by-step explanation:
It's easy see that each term is multiplied by 4 to get the next term, so the common ratio will be 4, that reduces the choices to answers A and B (since C and D use -1 as common ratio). Also, normally a geometric progression uses "n-1", so we'll first try with A to see if it works.
a1 = (-1) * 4^0 = -1 * 1 = -1
a2 = (-1) * 4^1 = -1 * 4 = -4
a3 = (-1) * 4^2 = -1 * 16 = -16
Yes, it works... so the answer is an = -1 • 4^(n - 1)
Choose all correct statements concerning roots of unity.
Answer:
all but the second statement are correct
Step-by-step explanation:
The n roots of unity are evenly spaced around a circle of radius 1 in the complex plane. One of the roots is always 1. If n is even, -1 will also be a root.
Please help me out if possible:)
Answer:
False
Step-by-step explanation:
The angle between a tangent and radius is right.
Use the converse theorem of Pythagoras to determine.
If the square on the longest side is equal to the sum of the squares on the other two sides then the triangle is right and the segment is a tangent.
longest side = 13.1 ⇒ 13.1² = 171.61
11.3² + 6.65² = 127.69 + 44.2225 = 171.9125
Since 171.61 ≠ 171.9125 the line is not a tangent
If the ratio between the radii of the two sphere is 3:5, what is the ratio of their volumes?
A. 3:25
B. 6:25
C. 9:25
D. 27:125
Answer: Option D
Step-by-step explanation:
You know that the ratio between the radii of the two sphere is 3:5. Knowing this fact, you can calculate the ratio of their volume with this procedure:
[tex]ratio\ volume=\frac{3^3}{5^3}[/tex]
You need to remember that:
[tex]a^3=a*a*a[/tex]
Then, you can rewrite it as:
[tex]ratio\ volume=\frac{3*3*3}{5*5*5}[/tex]
Finally, you get the the ratio of the volumes of the spheres is:
[tex]ratio\ volume=\frac{27}{125}[/tex] or 27:125
This matches with the option D.
Answer:
The ratio of their volumes is 27 : 125
Step-by-step explanation:
Points to remember
Volume of sphere V = 4/3(πr³)
Where r is the radius of sphere
To find the ratio of volume of spheres
It is given that, the ratio between the radii of the two sphere is 3:5
V₁ = 4/3(πr₁³) = 4/3(π3³) and
V₂ = 4/3(πr₂³) = 4/3(π5³)
V₁/V₂ = 4/3(π3³)/4/3(π5³)
= 3³/5³ = 27/125
Therefore the ratio of their volumes = 27 : 125
George is reading a book that is 420 pages long. He reads 45 pages on the first day. He will read the remaining pages in the book 15 more days. During that time he will read an equal number of pages each day. How many pages will he read each day.
Answer:
25
Step-by-step explanation:
The book is 420 pages long and he reads 45 pages so he has 375 pages left.
The will read equal amounts during the next 15 days so 375 ÷ 15 = 25
George reads 45 pages each day
How to find out how many pages will he read each day ?According to the problem,
George is reading a book that is 420 pages long.He reads 45 pages on the first day.He will read the remaining pages in the book 15 more days.Number of pages left after reading 45 pages = (420 - 45) = 375
Now, George completes the remaining pages in 15 days reading equal number of pages everyday.So number of pages he read per day = 375/15 = 25
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Write an equation of the line passing through point P(0,-1) that is parallel to the line y=-2x+3
Y = __
The answer to this question is:
y = -2x - 1
What are the relative minimum and relative maximum values over the interval [−4, 4] for the function shown in the graph?
A. relative minimum = −36 , relative maximum = 64
B. relative minimum = 0, relative maximum = 64
C. relative minimum = −3 , relative maximum = 64
D. relative minimum = −3 , relative maximum = −36
A relative minimum = −36 , relative maximum = 64
Answer:
A
Step-by-step explanation:
The relative minimum is where the curve changes directions from down to up. The relative maximum is where the curve changes direction from up to down.
In the interval [-4, 4], there are two relative minimums: y=-36. And there is one relative maximum: y=64.
Answer A.
What is the area of the triangle
ANSWER
B. 24 sq. units.
EXPLANATION
The area of a triangle is calculated using the formula:
[tex]Area = \frac{1}{2} \times AB \times BC[/tex]
From the graph ,
AB=3--3=6 units.
BC=3--5=8 units
We substitute the values into the formula to get,
[tex]Area = \frac{1}{2} \times 6 \times 8 = 24sq. \: units[/tex]
The correct answer is B
Please answer this question only if you know it! 25 points and brainliest!
Answer:
[tex]\boxed{70^\circ}[/tex]
Step-by-step explanation:
Step 1. Calculate θ
[tex]\begin{array}{rcll}70^{\circ} + \theta + 60^{\circ} & = & 180^{\circ} & \text{Angles of straight line}\\130^{^{\circ}} + \theta & = & 180^{\circ}} & \\\theta & = & 50^{\circ} & \\\end{array}[/tex]
Step 2. Calculate x
[tex]\begin{array}{rcll}60^{\circ} + \theta + x & = & 180^{\circ} & \text{Interior angles of triangle}\\60^{\circ} + 50^{\circ} + x & = & 180^{\circ} &\\110^{^{\circ}} + x& = & 180^{\circ} & \\\\x & = & \boxed{70^\circ} & \\\end{array}[/tex]
*20 POINTS PLEASE HELP ME!!!!!!!!*
Answer:
helloooooooooooooooooooo
The parent function f(x) = x2 is translated such that the function g(x) = –x2 + 6x – 5 represents the new function.
What is true about the transformation that was performed? Check all that apply.
g(x) has an axis of symmetry at x = 3.
g(x) is shifted down 5 units from the graph of f(x).
g(x) is shifted right 3 units from the graph of f(x).
g(x) is shifted up 4 units from the graph of f(x).
g(x) is narrower than f(x).
Answer:
g(x) has an axis of symmetry at x = 3.
g(x) is shifted right 3 units from the graph of f(x)
g(x) is shifted up 4 units from the graph of f(x).
Step-by-step explanation:
The parent function is:
[tex]f(x)=x^2[/tex]
The transformed function is [tex]g(x)=-x^2+6x-5[/tex].
This new function can be rewritten in the vertex form as:
[tex]g(x)=-(x-3)^2+4[/tex]
This function is obtained by shifting the parent function 3 units right and 4 units up.
The axis of symmetry is x=3;(x=h) and h=3.
There is no horizontal stretch or compression.
The new function is however reflected in the x-axis
Step-by-step explanation:
on edge its A,C,D :)
solve by substitution:
-5x + y = -2
-3x + 6y = -12
please explain
First we pick the equation. Let's say we pick first one. From it we express y.
[tex]-5x+y=-2\Longrightarrow y=-2+5x[/tex]
Then we use this y and plug it in instead of y in the second equation.
[tex]-3x+6(-2+5x)=-12[/tex]
Now just solve for x.
[tex]
-3x-12+30x=-12 \\
-3x=-30x \\
\underline{x=10}
[/tex]
We plug this x in the first equation.
[tex]-5\cdot10+y=-2[/tex]
And solve for y.
[tex]
-50+y=-2 \\
\underline{y=48}
[/tex]
So the solution to the equation is geometrically a point P which lies on the intersection of the two lines.
[tex]\boxed{P(10,48)}[/tex]
Hope this helps.
r3t40
Page 2
7. Donald has 6 unit cubes. How many
different rectangular prisms can he
make using all 6 unit cubes?
Answer:
Step-by-step explanation:
2
With 6 unit cubes, it is possible to form 4 distinct rectangular prisms: 1x1x6, 1x2x3, 1x3x2, and 2x3x1.
Explanation:The subject here is combinatorial mathematics focusing specifically on the construction of geometric shapes with a limited number of unit cubes. With 6 unit cubes, Donald can make 4 different rectangular prisms:1x1x6, 1x2x3, 1x3x2, and 2x3x1, each dimension representing length, width, and height in units. Here, the number of ways to arrange the cubes depends on unique combination of dimensions that respect the given total volume (i.e., number of unit cubes), which is 6 in this case.
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Which criteria for triangle congruence can be used to prove the pair of triangles below are congruent?
A. SAS
B. ASA
C. AAS
D. none
Answer:
A)SAS
Step-by-step explanation:
The tick marks represent which sides of the triangles are congruent, while the arc represents which angles are congruent.
Since the arc is in between the sides that are congruent therefore the postulate is Side Angle Side
Without visual or informational context, the congruence criteria between the pairs of triangles cannot be determined. It's essential to know specific details about the triangles to apply congruence criteria like Side-Angle-Side (SAS), Angle-Side-Angle (ASA), or Angle-Angle-Side (AAS). However, with no further details, the answer is 'D. None'.
Explanation:To determine which criterion for triangle congruence can be used to prove that the pair of triangles are equal, we first need to examine the triangles. SAS refers to Side-Angle-Side, which is when two sides and the included angle of one triangle is congruent to two sides and the included angle of another triangle. ASA refers to Angle-Side-Angle, which is when two angles and the included side of one triangle is congruent to two angles and the included side of another triangle. AAS refers to Angle-Angle-Side, which is when two angles and a non-included side of one triangle is congruent to two angles and a non-included side of another triangle. So, without a visual or further information about the triangles, we cannot directly apply any particular congruence criteria and the answer would be 'D. none'. However, with more information, the pair of triangles can possibly be proven congruent using either SAS, ASA, or AAS methods.
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Lines m and n are parallel. What is the measure of angle 4?
Answer:
132 deg
Step-by-step explanation:
from diagram, if lines m and n are parallel, then angle 3 = angle 7 and angle 4 = 132deg
The measure of angle 4 depends on its relationship to other angles in the diagram. If angle 4 is an alternate interior angle to another angle whose measure we know, it would share that measure.
Explanation:To find the measure of angle 4 given that lines m and n are parallel, we need to understand a concept in geometry called alternate interior angles. According to this concept, when a line (called a transversal) intersects two parallel lines, the pairs of alternate interior angles it forms are equal. So, if angle 4 is an alternate interior angle to another angle whose measure we know, we can say that the measure of angle 4 is equal to that angle. Therefore, without knowing the measure of the corresponding angle, we can't provide a definitive measure for angle 4.
To make this more concrete, let's imagine we have a situation where lines m and n are parallel and line t is a transversal. We know the measure of angle 3 (on line m and intersected by t) is 75 degrees. If angle 4 is on line n and forms a Z shape with angle 3 (making them alternate interior angles), the measure of angle 4 would also be 75 degrees.
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