You use the formula C=2(3.14)r r is the radius and in this situation 2 so the answer will be 12.56
Answer:
The price per book that Mary purchased is $12
Step-by-step explanation:
Mary's total cost can be expressed as;
C=(p×n)+s
where;
C=total cost
p=price per unit of books
n=number of books purchased
s=shipping fee
In our case;
C=$55.25
p=unknown
n=4
s=$7.25
replacing;
55.25=(4×p)+7.25
4 p+7.25=55.25
4 p=55.25-7.25
4 p=48
p=48/4
p=12
The price per book that Mary purchased is $12
9×2=18. add the tow zeros like this 9×2=18+00=1,800
Answer:
see explanation
Step-by-step explanation:
given
- 3x + 2 - 5x - 7 = 4x + 2
The first step is to simplify the left side by collecting like terms
- 8x - 5 = 4x + 2
