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?

a. b = 2A over 9 + 35

b. b = 2 multiplied by A over 9 - 35

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

d. b = 2 multiplied by A minus 35, all over 9

Answer 1

So \[\large \bf A~=~\frac{9}{2} (b+35)\]

Answer 2

yes

Answer 3

I know it's either B or D

Answer 4

First step is to get "b+35" by itself. You can do so by multiplying the inverse of the fraction 9/2 on both sides.

Answer 5

2a/9

Answer 6

Correct. So \[\large \bf \frac{2A}{9}~=~b+35\] To get the b alone we subtract the 35 over

Answer 7

but does it go on top with the 2a or next to the fraction

Answer 8

It will be next to the fraction.

Answer 9

Thank you sooo much!

Answer 10

\[\huge \color{aqua}N\color{fuchsia}o \space \color{lime}P \color{orange}r \color{blue}o \color{maroon}b \color{red}l \color{olive}e \color{purple}m \ddot\smile \]