Answer:well you don't have x because x would be 1
Answer:
21 cm
Step-by-step explanation:
To find the radius, half the diameter (42cm)
hope this helps :)
ANSWER:
The value of x is 2 and of y is 4

STEP-BY-STEP EXPLANATION:
We have the following equation system

solving for substitution:
The answer is one becuase if you add -x tot he 3x you get 4 and then divide by four and get one
Answer:
4
Step-by-step explanation:
r = 
16π² = 157.9136704
= 3.54
3.54 rounded up is 4