Question

The equation below shows the area of a trapezoid, A, with a height of 9 cm, and one base 35 cm:

A = 9 over 2 (b + 35)

Which of the following formulas correctly solves for the other base, b? (1 point)

a
b = 2A over 9 + 35

b
b = 2A over 9 − 35

c
b = 2 multiplied by A + 35, all over 9

d
b = 2 multiplied by A â ' 35, all over 9

Answer 1

Hello @Johnb and Welcome to QuestionCove!

It looks like this is your equation
\(A = \frac{9}{2}(b+35)\)

Your goal is to try to undo the multiplication and undo the addition to try to get the ` b ` value by itself.

Answer 2

I would suggest multiplying both sides by 2/9
then subtracting both sides by 35

if you are confused by what I mean by this, just let me know

Answer 3

` I would suggest multiplying both sides by 2/9 `

\(\frac{2}{9}*A = \frac{2}{9}*\frac{9}{2}(b + 35)\)
^ try simplifying this

Answer 4

` then subtracting both sides by 35 `

\(\frac{2}{9}*A ~~- 35=b ~+~35 ~-35\)

simplifying this will get you your answer