Answer:
Step-by-step explanation:
A=1/2(r+2)
2A=f(r+2)
2A/f=r+2
2A/f-2=r
Answer:
Option A. -6.5
Step-by-step explanation:
we have

Solve for r
That means ---> isolate the variable r
Combine like terns left side of the equation

Divide by 0.5 both sides


Answer:
52 marbles i think
Step-by-step explanation:
Answer:
1663
Step-by-step explanation:
Answer:
2370 cm²
Step-by-step explanation:
2(32·15+15·15+15·32) = 2370