Answer:
A would be 13
So the full point would be (13,-3)
Answer:
15:21 = 5:7
Step-by-step explanation:
21/7 = 3
5 x 3 = 15

Start by writing a formula, where
is Brad's purchase price and
is the original price.

Subtract
from both sides.

Multiply both sides by
.

X=2 because first you have to combine like terms. Than you have to bring the Varible on one side. Finally you solve for the Varible and you get the answer2.