All categories

3 years ago

What is the value of B after the equation A=3/7(B-25)

1 answer:

7 0

If your equation is A = 3(B-25)/7, then we can solve for B by isolating B on one side. We can do this by the following...

First, multiply both sides by 7
7A = 3(B-25)

Next, divide both sides by 3.
7A/3 = B - 25

Finally, add 25 to both sides.
7A/3 + 25 = B

Therefore, B = 25 + 7A/3

You might be interested in

A car traveling at a certain speed will travel 76 feet per second. How man yards will the car travel in 120 seconds if it ma bra

lys-0071 [83]

The equation is 76*120/3.

76*120/3
9,120/3
3,040

The car will travel 3,040 yards in 120 seconds at that speed.

7 0

3 years ago

A piece of string is 144 inches long. Isabel wants to cut it into 2 pieces so that one piece is five times as long as the other.

Alex Ar [27]

Answer:

24 inches
120 inches

Step-by-step explanation:

The lengths can be found by considering their ratio:

short : long = 1 : 5

The sum of the ratio units is 1+5 = 6, and the sum of the lengths is 144 inches. That means each "ratio unit" stands for (144 in)/6 = 24 inches of length.

The lengths are ...

1 : 5 = 24 in : 120 in

The pieces are 24 inches and 120 inches in length.

Equivalently, you can let s represent the shorter length. Then 5s is the longer one, and their total is ...

s +5s = 144

s = 144/6 = 24

5s = 5(24) = 120

The lengths are 24 inches and 120 inches.

5 0

2 years ago

What is the ratio of x to y?

abruzzese [7]

$\frac{3}{2} = \frac{2x}{2x+y}$

From any proportion, we get another proportion by inverting the extremes (or the means):

$\frac{2x+y}{2} = \frac{2x}{3}$ = k

so we have:

2x=3k
2x+y=2k therefore:
3k+y=2k
y= - k

x= $\frac{3}{2} k$

$\frac{x}{y}$ = - $\frac{3}{2}$

The corect answer is A. -3/2

or:

$\frac{3}{2} = \frac{2x}{2x+y}$

From any proportion, we get another proportion by inverting the extremes and the means:

$\frac{2x+y}{2x} = \frac{2}{3}$

We use a property of proportions:

$\frac{a}{b} = \frac{c}{d}$ where a, d are extremes and b,c are means and the product of the extremes equals the product of the means (a*d=b*c),

so we have

$\frac{a-b}{b} = \frac{c-d}{d}$ or

$\frac{a+b}{b} = \frac{c+d}{d}$ (you can check this also by "the product of the extremes equals the product of the means")

$\frac{2x+y}{2x} = \frac{2}{3}$

$\frac{(2x+y)-2x}{2x} = \frac{2-3}{3}$

$\frac{y}{2x} = \frac{-1}{3}$

3y = - 2x

$\frac{x}{y} = -\frac{3}{2}$

4 0

3 years ago

If the triangle on the grid below is translated by using the rule (x, y) right-arrow (x + 5, y minus 2), what will be the coordi

wlad13 [49]

9514 1404 393

Answer:

B. (0, –2)

Step-by-step explanation:

Put the (x, y) values into the given formula.

(x, y) ⇒ (x +5, y -2)

B(-5, 0) ⇒ B'(-5+5, 0-2) = B'(0, -2)

3 0

3 years ago

HELP i dont know how to do this

Korvikt [17]

Answer

Step-by-step explanation:

First, lets go through B-D and explain why they are correct.

B= f represents the number of flash drives. This means that the coefficient, 10, would be the cost per flash drive.

C= n represents the number of cases of paper. it says so in the question, so that one is a bit easier.

D= f represents the amount of packages of hanging folders. If the coefficient for B is the cost, then that would be the same case for D. Therefore it is correct because the coefficient is 13.

A would be incorrect because the coefficient represents the amount that one item costs. P is the packs of pencils, meaning that it would be $7 per pack of pencils.

Hope this helps!

3 0

3 years ago