20% of $50 = $10
30% of $50 = $15
40% of $50 = $20
Multiply 20% by $50
30% by $50
40% by %50
Answer:
c
Step-by-step explanation:
a
First step, divide 6 from both sides.
t/6=r^2+1
second step, subtract 1 from both sides
t/6 -1=r^2
Now take the square root of each side.
Done!