Mark me brainlyiest and the answer is b I know becuase I took the test
R=x(A+B)
divide both sides by x
R/x=A+B
minus B both sides
(R/x)-B=A
A=(R/x)-B
He still has 75% of his income left because 1500/375=4 so he spent 1/4 of his check and has 3/4 left.
Answer:

Step-by-step explanation:
--- sides





Required
The measure of B
The interior angles of a polygon is:

So, we have:



The measure of B is calculated using:

Substitute known values

Collect like terms


Collect like terms

