Answer:
6r+7=13+7r
6r+7=7r+13
6r+7−7r=7r+13−7r
−r+7=13
−r+7−7=13−7
−r=6
= 
r=−6
Step-by-step explanation:
:) This is the answer
Seven and twenty five hundredths, or seven and a quarter
Answer:
Step-by-step explanation: to find circumference, u do 2*pi*radius or pi times diameter