Answer:
21.) y=x
23.) y= -1x-2
Step-by-step explanation:
y=mx+b
m is the slope
b is the y intercept
y=mx + b
(21) y=1x + 0
b is the y-intercept
0.25
1e+35
C. 56.25π
Circumference=15π=πd⇒d=15
Area=πr^2⇒r=d/2⇒r=7.5⇒π7.5^2=56.25π
