Question

I need help! I don't understand this!

Answer 1

When they say to solve for a variable, they want you to isolate/get the variable by itself.

5.) Solve for b (get b by itself)

`A=(1)/(2)bh` Multiply 2 on both sides to get rid of the 1/2

2A = bh Divide h on both sides

`(2A)/(h) =b`

6.) Solve for r

`C=2\pi r` Divide 2 and
`\pi` on both sides

`(C)/(2\pi ) =r`