Answer:
137.2 m³
Step-by-step explanation:
The ratio of volumes is the cube of the ratio of linear dimensions. The larger volume is ...
... V = (7/5)³ × 50 m³ = 2.744 × 50 m³
... V = 137.2 m³
triangles abc and def are similar. The length of each side of triangle abc is 8 times the length of each corresponding side of triangle def. How many times greater is the area of triangle abc than the area of triangle def
64
Step-by-step explanation:If each side length is multiplied by 8, the product of two side lengths will be multiplied by 8×8 = 64.
Area is proportional to the product of two side lengths, so will be multiplied by 64.
what is the equation of the circle with center (0,0) the passes through the point (5,-5). please help
x² + y² = 50
Step-by-step explanation:The circle centered at (h, k) with radius r has equation ...
... (x -h)² + (y -k)² = r²
You have (h, k) = (0, 0), so all we need to do is find r². We can do that by choosing r² so that the equation is true at the given point.
... x² + y² = (5)² + (-5)² = 25 + 25 = 50
Your equation is x² + y² = 50.
What is -2 1/2 divided by 6?
A. -2 1/6
B. 5/12
C. 2 1/6
D. -5/12
Answer:
D -5/12
Step-by-step explanation:
2 1/2 = 2·(2/2) + 1/2 = 5/2
Dividing by 6 is the same as multiplying by 1/6.
... (-5/2)×(1/6) = -5·1/(2·6) = -5/12
Solve the logarithmic equation.
y = log4 0.25
What does y equal?
[tex]\bf \textit{exponential form of a logarithm} \\\\ log_a b=y \implies a^y= b\qquad\qquad a^y= b\implies log_a b=y \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ y=\log_4(0.25) ~\hfill 0.\underline{25}\implies \cfrac{025}{1\underline{00}}\implies \cfrac{1}{4}\implies 4^{-1} \\\\\\ y=\log_4\left( 4^{-1} \right)\implies 4^y=4^{-1}\implies y=-1[/tex]
PLEASE ANSWER QUICKLY I WILL GIVE BRAINIEST
Answer:
[tex]<\:3[/tex] is the angle of elevation from the boat to the lighthouse.
Step-by-step explanation:
From the boat, the angle through which you will raise your head to see the light house is the angle of elevation, which is [tex]<\:3[/tex].
See graph for the illustration.
The correct answer is A
Answer:
The angle of elevation from the boat to the lighthouse is:
First option: <3
Step-by-step explanation:
The angle of elevation from the boat to the lighthouse is the angle of the visual since the boat to the lighthouse with the horizontal, according with the graph this angle is <3 (First option)
To convert 6 weeks to days, the first ratio is 1 week/7 days . To set up the proportion, the second ratio must be _____
Answer:
6/x weeks
Hope this helps
Answer:
6/x weeks
Step-by-step explanation:
This is the correct answer, credits to the other person who answered.
Use the information in the diagram to determine the height of the tree to the nearest foot.
the diagram is not to scale.
A. 60
B. 30
C. 28
D. 120
Answer:
The correct option is A. The height of tree is 60 ft.
Step-by-step explanation:
From the given figure it is noticed that the building is creating a right angle triangle from a point and the tree divides the hypotenuse and base in two equal part.
According to midpoint theorem of triangle: In a triangle, if a line segment connecting the midpoints of two sides, then the line is parallel to third side. The length of line segment is half of the length of third side.
Using midpoint theorem of triangle, we can say that the length of tree is half of the building.
[tex]Tree=\frac{1}{2}\times Building[/tex]
[tex]Tree=\frac{1}{2}\times 120[/tex]
[tex]Tree=60[/tex]
Therefore correct option is A. The height of tree is 60 ft.
The ratio of students that ride the bus as compared to those that walk is 10:1. Does this school have more students that ride the bus or walk? how so you know?
Answer:
more that ride the bus10:1 is more than 1:1Step-by-step explanation:
riders : walkers = 10 : 1
The ratio tells you that 10 students ride the bus for every 1 student that walks. Since 10 is more than 1, more students ride the bus.
We know more students are riders, because we know that 10 is more than 1.
A graph has a constant of proportionality of 2.54. Let y represent centimeters and x represent inches.
What is the unit rate of the relationship?
Enter your answer, as a decimal, in the box
______cm/in.
2.54 cm/in
Step-by-step explanation:In this context, "constant of proportionality" and "unit rate" mean the same thing.
A grocer sells 30 loaves of bread a day. The cost is $2.50 per loaf. The grocer estimates that for each $0.50 increase in cost, 2 fewer loaves of bread will be sold per day. Let x represent the number of $0.50 increases in the cost of a loaf of bread.For what number of $0.50 increases in the cost of a loaf of bread will the grocer's generated revenue be greater than zero?
A. The grocer's generated revenue will be greater than zero for any number of $0.50 increases greater than 20.
B. The grocer's generated revenue will be greater than zero for any number of $0.50 increases less than 20.
C. The grocer's generated revenue will be greater than zero for any number of $0.50 increases greater than 15
.
D. The grocer's generated revenue will be greater than zero for any number of $0.50 increases less than 15.
Answer:
none of the above
Step-by-step explanation:
The grocer's revenue will be the product of the number of loaves sold (30-2x) and their price (2.50+0.50x).
Revenue will be positive for values of x between those that make these factors be zero. The number of loaves sold will be zero when ...
... 30 -2x = 0
... 15 -x = 0 . . . . . divide by 2
... x = 15 . . . . . . . add x
The price of each loaf will be zero when ...
... 2.50 +0.50x = 0
... 5 + x = 0 . . . . . . . multiply by 2
... x = -5 . . . . . . . . . . subtract 5
Revenue will be positive for any number of increases greater than -5 and less than 15.
_____
D is the best of the offered choices, but it is incorrect in detail. -5 is a number less than 15, but will give zero revenue.
I just need help with Number 17 when it comes to writing out the equation
Answer:
132(X) + 64(2X) = $1040.00
Step-by-step explanation:
equations
64a +132s = 1040a = 2ssolution
Adult ticket: $8Student ticket: $4Step-by-step explanation:a. It usually works well to let a variable represent the quantity the problem statement is asking you to find. I like to choose variable names that help me remember what the variable stands for. (x and y rarely do that) So, let's choose "a" for the cost of an adult ticket, and "s" for the cost of a student ticket.
The equations express the relationships described by the problem statement. The first relationship expresses the total revenue in terms of the numbers of tickets sold. You know that multiplying the number of tickets by the cost of the ticket will give the revenue from sales of that ticket. So, the total revenue is ...
... 64a +132s = 1040
The problem statement also tells you the relationship between the costs. An adult ticket is twice the cost of a student ticket, so ...
... a = 2s
These equations are your system of linear equations.
_____
b. The solution can be found using substitution. Since the second equation gives an expression for "a", we can use that in the first equation.
... 64(2s) +132s = 1040
... 260s = 1040 . . . . . . . . simplify
... 1040/260 = s = 4
... a = 2s = 2·4 = 8
An adult ticket costs $8; a student ticket costs $4.
URGENT !! What is the value of Y?
Answer:
B. 68°Step-by-step explanation:
We know:
The sum of the measures of the angles of the triangle is equal to 180 °.
Therefore we have the equation:
[tex]y+(y-12)+56=180[/tex] combine like terms
[tex]2y+44=180[/tex] subtract 44 from both sides
[tex]2y=136[/tex] divide both sides by 2
[tex]y=68[/tex]
What is the simplified value of the expression below?
A. 18.25
B. 21.38
C. 27.56
D. 42.75
Answer:
A. 18.25
Step-by-step explanation:
After you do the multiplications, the problem is
... (56 +90)/8 = 146/8 = 18.25
_____
The division bar is a grouping symbol, equivalent to parentheses around both numerator and denominator. You must evaluate the numerator before you can divide by the denominator, which also must be evaluated before that division.
Translate the difference of five squared and n into symbols.
5^2- n
5^2+ n
5^2x n
5^2 ÷ n
Answer:
5² - n
Step-by-step explanation:
Five squared = 5²
n = n Subtract n from 5²
Diff. = 5² - n
We indicate "taking the difference" by a "minus" sign, so all the other options are wrong.
Answer:
5² - n
Step-by-step explanation:
Five squared is written as = 5²
The symbol of n is n.
The term difference is subtraction.
The difference of five squared and n ⇒ 5² - n
I WILL GIVE THE BRAINLEST HURRY PLEASE
Answer:
B) 6
Step-by-step explanation:
It is 45, 45, 90 degrees right triangle, the ratio of the triangle 1:1:√2
Hypotenuse = 3√2*√2
= 3*2
= 6
Thank you.
Answer:
6
Step-by-step explanation:
Hypotenuse is the side that is opposite of the 90 degree angle (the longest side as well).
As seen in the triangle, the side opposite of 45° angle is known AND we want to find the hypotenuse.
Which trigonometric ratio relates opposite with hypotenuse?
SINE
We can write:
[tex]sin(A)=\frac{opposite}{hypotenuse}\\sin(45)=\frac{3\sqrt{2}}{h}[/tex]
We let hypotenuse be [tex]h[/tex]. Also we know that [tex]sin(45)=\frac{1}{\sqrt{2}}[/tex]
Now we can solve for [tex]h[/tex]:
[tex]sin(45)=\frac{3\sqrt{2}}{h}\\h*sin(45)=3\sqrt{2}\\h=\frac{3\sqrt{2}}{sin(45)}\\h=\frac{3\sqrt{2}}{\frac{1}{\sqrt{2}}}\\h=3\sqrt{2}*\frac{\sqrt{2}}{1}\\h=6[/tex]
(we used the identity [tex](\sqrt{a})(\sqrt{a})=a[/tex])
2nd answer choice is right. Hypotenuse is 6.
The side of a square is 3 cm smaller than one of the sides of a rectangle and 2 cm greater than its other side. Find the side of the square, if it’s known that the area of the square is 30 cm^2 less than the area of the rectangle.
36 cm
Step-by-step explanation:Let s represent the side of the square in cm. Then s+3 and s-2 are the sides of the rectangle of interest.
The area of the rectangle is the product of its side lengths:
... rectange area = (s+3)(s-2) = s² +s -6
The area of the square is the product of its side lengths, both of which are s.
... square area = s²
The difference of these areas is 30 cm², so ...
... rectangle area - square area = 30
... (s² +s -6) -(s²) = 30
... s = 36 . . . . . . . . . . . . simplify, add 6
The side of the square is 36 cm.
_____
Check
The rectangle dimensions are 39 cm by 34 cm, so its area is
... (39 × 34) cm² = 1326 cm²
The area of the square is (36 cm)² = 1296 cm²
The difference in areas is (1326 -1296) cm² = 30 cm², as required.
There are 18 gallons of water in the tank. The tank is 3/4 full. How many gallons of water g can the tank hold
Answer:
24 gallons
Step-by-step explanation:
18 divided by 3 is 6
6 x 4 = 24
so there are 24 gallons as a whole
You said . . . . . 18 = 3/4 g
Multiply each side by 4 . . . 72 = 3g
Divide each side by 3 . . . 24 = g
Factor completely 7x3y +14x2y3 − 7x2y2.
Answer:
7x^2y(x +2xy^2 -y)
Step-by-step explanation:
7, x^2, and y are factors of every term, so we can start by factoring those out.
... = 7x^2y(x +2xy^2 -y)
The trinomial does not factor further, so this is it.
Answer:
7x^2y(x +2xy^2 -y)
Step-by-step explanation:
7x^3y +14x^2y^3 − 7x^2y^2
WE find out GCF
7x^3y= 7*x*x*x*y
14x^2y^3= 7*2*x*x*y*y*y
7x^2y^2 = 7 *x*x*y*y
GCF is 7x^2y
Factor out GCF from the given expression. when we factor out 7x^2y we divide each term by GCF. we put GCF 7x^2y outside
7x^2y(x +2xy^2 -y)
Pvc pipe is manufactured with a mean diameter of 1.01 inch and a standard deviation of 0.003 inch. the diameters are known to be normally distributed. find the probability that a random sample of n = 9 sections of pipe will have a sample mean diameter greater than 1.009 inch and less than 1.012 inch.
Answer:
about 82%
Step-by-step explanation:
The distribution of sample means has a standard deviation that is the pipe standard deviation divided by the square root of the sample size. Thus, the standard deviation of the sample mean is 0.003/√9 = 0.001.
Then the limits on sample mean are 1.010 - 1×0.001 = 1.009 and 1.010 +2×0.001 = 1.012. The proportion of the normal distribution that lies between -1 and +2 standard deviations is about 81.9%.
The problem involves statistical calculation involving mean, standard deviation, and Z-scores of a normal distribution. We first calculate sample standard deviation, then the Z-scores for the given range. After finding probabilities for the Z-scores, we subtract to get the final probability of 0.8185.
Explanation:The problem at hand involves the field of statistics, specifically, the normal distribution, sample mean, and standard deviation. We can use the following steps to solve the problem:
Determine the standard deviation of the sample. Given the standard deviation of the population (σ population) is 0.003 inch and the sample size (n) is 9, we use the formula σ sample = σ population/sqrt(n), which gives 0.003/sqrt(9) = 0.001.Calculate the Z-scores for 1.009 and 1.012. The Z-score is determined by the formula: Z = (X - μ) / σ. For X=1.009, Z1 = (1.009-1.01)/0.001 = -1. For X=1.012, Z2 = (1.012-1.01)/0.001 = 2.Using a Z-table or appropriate statistical software, find the probability corresponding to these Z-scores. The probability for Z1=-1 is 0.1587, and for Z2=2, it is 0.9772.Lastly, subtract the smaller probability from the larger one to get the probability that a sample mean is greater than 1.009 but less than 1.012. So, the answer is 0.9772 - 0.1587 = 0.8185.Learn more about Normal Distribution here:https://brainly.com/question/34741155
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What are the solutions to the equation?
x2 + 6x = 40
x = −10 and x = 4
x = −8 and x = 5
x = −5 and x = 8
x = −4 and x = 10
Answer:
x = −10 and x = 4
Step-by-step explanation:
x2 + 6x = 40
Subtract 40 from each side
x^2 + 6x -40 =0
Factor, what 2 numbers multiply to -40 and add to 6
10 * -4 = -40 10+-4 = 6
(x+10) (x-4) = 0
Using the zero product property
x+10 =0 x-4=0
x=-10 x=4
Answer:
x = −10 and x = 4
Step-by-step explanation:
We are given the following quadratic equation and we are to solve it to find the two solution for the variable x:
[tex]x^2+6x=40[/tex]
Rearranging the equation by putting the constant on the same side as the variables to get:
[tex]x^{2} +6x-40=0[/tex]
Now factorizing it to get:
[tex]x^{2} -4x+10x-40=0\\\\x(x-4)+10(x-4)=0\\\\(x+10)(x-4)=0\\\\x= -10, x= 4[/tex]
Therefore, the solution to the given quadratic equation [tex]x^2+6x=40[/tex] are x = −10 and x = 4.
Consider the system of equations:
2x - 3y = 7
x + 4y = 9
What is the solution to the system?
( use elimination or substitution )
Answer:
(x, y) = (5, 1)
Step-by-step explanation:
To eliminate x, you can double the second equation and subtract the first.
... 2(x +4y) -(2x -3y) = 2(9) -(7)
...11y = 11 . . . . . simplify
... y = 1 . . . . . . divide by 11
Using the second equation to find x, we have ...
... x + 4·1 = 9
... x = 5 . . . . . subtract 4
_____
Check
2·5 -3·1 = 10 -3 = 7 . . . . agrees with the first equation
(Since we used the second equation to find x, we know it will check.)
Which angle has a positive measure?
Answer:
The measure of angle B is positive
Step-by-step explanation:
we know that
Positive angles are those measured counterclockwise.
therefore
in this problem
The measure of angle B is positive
Noel has 5/6 of a yard of purple ribbon and 9/10 of a yard of pink ribbon. How much ribbon does she have altogether?
A) Between x 2 and x 3, which function has a greater average rate of change than f(x)=1/6^-x
Answer:
4^x+1
Step-by-step explanation:
because i got it wrong
Answer:
[tex]y= 4^{x+1}[/tex]
Step-by-step explanation:
If your car gets 26 miles per gallon, how much does it cost to drive 430 miles when gasoline costs $3.00 per gallon?
Answer:
$51
Step-by-step explanation:
To solve this, we must divide the total amount of miles by the miles per gallon, and multiply that by the cost per gallon.
430 / 26 = 16.53
Because this is talking about gallons, we should round up to 17.
17 * 3 = 51
It costs $51 to drive 430 miles when gasoline costs $3 per gallon.
Answer:
$49.62
Step-by-step explanation:
We know that the car travels for 26 miles in 1 gallon. So we will find out the number of gallons it requires to travel for 430 miles by simple ratio method.
[tex]\frac{1 gallon}{x} =\frac{26 miles}{430}[/tex]
[tex]x=\frac{430}{26}[/tex]
[tex]x=16.54[/tex]
Now that we know that the car needs 16.54 gallons of gasoline to drive for 430 miles, we can simply multiply the number of gallons by the cost per gallon to find its total cost.
Total cost of gasoline to drive 430 miles = 16.54 x 3 = $49.62
I need help fast please!!!!!!!!!!!!!!!!!
Answer:
HL
Step-by-step explanation:
The two hypotenuses of these right triangles are marked congruent, and the leg QS is shared, hence congruent.
The HL theorem applies.
What is the volume of this rectangular prism?
3ft by 6 1/4 ft by 14 ft
Given: y varies directly as x. If y = 5 when x = 4, what is the value of y when x = 12? A) 9.6 B) 10 C) 12 D) 15
Answer:
D) 15
Step-by-step explanation:
We know the formula for direct variation is
y=kx
Substituting y=5 and x=4 we can calculate k
5=k4
Divide each side by 4
5/4 =k
Now y= 5/4 x
If x =12
y =5/4*12
y = 15
A town's population is 53,075. About 100 people move out of the town each month. Each month, 200 people on average move into town. A nearby town has a population of 55,825. It has no one moving in and an average of 175 people moving away every month. In about how many months will the populations of the towns be equal? Write an equation to model the situation. Then solve the equation and answer the question.
If we let m represent the number of months, then the population increase of the first town is 100m and its decrease is 200m. The population decrease of the second town is 175 m.
We want to find m such that the increases and decreases make the towns' populations equal. We add the increases and subtract the decreases to the base population in each case.
... first town population = second town population
... 53075 -100m +200m = 55825 -175m . . . . . the model equation
Solution
... 100m = 2750 -175m . . . . . collect terms, subtract 53075
... 275m = 2750 . . . . . . . . . . add 175m
... m = 10 . . . . . . . . . . . . . . . . . divide by 275
The populations will be equal in 10 months.
Answer:
175m-125m+38,200=40,600-150m
Step-by-step explanation:
I just completed it on imagine math
a) Find a polynomial, which, when added to the polynomial 5x2–3x–9, is equivalent to: 18
b) Find a polynomial, which, when added to the polynomial 5x2–3x–9, is equivalent to: 0
Answer:
a) [tex]-5x^{2}+3x+27[/tex]
b) [tex]-5x^{2}+3x+9[/tex]
Step-by-step explanation:
a) Let the required polynomial be p(x).
We have the relation, [tex]5x^{2}-3x-9[/tex] + p(x) = 18
i.e. p(x) = 18 [tex]-5x^{2}+3x+9[/tex]
i.e. p(x) = [tex]-5x^{2}+3x+27[/tex]
b) Let the required polynomial be q(x).
We have the relation, [tex]5x^{2}-3x-9[/tex] + q(x) = 0
i.e. q(x) = 0 [tex]-5x^{2}+3x+9[/tex]
i.e. q(x) = [tex]-5x^{2}+3x+9[/tex]
Answer:
(a) [tex]-5x^2+3x+27[/tex]
(b) [tex]-5x^2+3x+9[/tex]
Step-by-step explanation:
(a)
Let the polynomial be Q(x).
Given polynomial P(x) = [tex]5x^2-3x-9[/tex]
As per the given statement: A polynomial(Q(x)) which, when added to the polynomial [tex]5x^2-3x-9[/tex], is equivalent to 18.
[tex]P(x)+Q(x) = 18[/tex]
[tex]5x^2-3x-9 +Q(x) = 18[/tex]
⇒[tex]Q(x) = 18 -(5x^2-3x-9)[/tex]
or
[tex]Q(x) = 18 -5x^2+3x+9[/tex]
Simplify:
[tex]Q(x) =-5x^2+3x+27[/tex]
Therefore, the polynomial is, [tex]-5x^2+3x+27[/tex]
Check:
[tex]P(x)+Q(x)[/tex] = [tex]5x^2-3x-9 +(-5x^2+3x+27)[/tex]
= [tex]5x^2-3x-9 -5x^2 +3x+27[/tex]
= 18
(b)
Let the polynomial be Q(x).
Given polynomial P(x) = [tex]5x^2-3x-9[/tex]
As per the given statement: A polynomial(Q(x)) which, when added to the polynomial [tex]5x^2-3x-9[/tex], is equivalent to 0.
[tex]P(x)+Q(x) = 0[/tex]
[tex]P(x) = -Q(x)[/tex]
⇒[tex]Q(x) = -(5x^2-3x-9)[/tex]
or
[tex]Q(x) = -5x^2+3x+9[/tex]
Therefore, the polynomial is, [tex]-5x^2+3x+9[/tex]
Check:
[tex]P(x)+Q(x)[/tex]=[tex]5x^2-3x-9 +(-5x^2+3x+9)[/tex]
= [tex]5x^2-3x-9-5x^2 +3x+9[/tex]
= 0