Amelia had 22 sea shells. Then, she collected 10 more sea shells. After that, she gave S sea shells to her little sister. Which of the following shows how many sea shells she has currently?

A.
22 + S - 10
B.
22 - 10 - S
C.
22 + 10 - S
D.
22 + S + 10

D. 22 + S + 10

wrong try again

C. 22 + 10 - S

Sara and three roommates equally share the rent on their apartment. The rent is r dollars. Which expression shows Sara's share of the rent?

A.
r × 4
B.
r + 4
C.
r - 4
D.
r ÷ 4

D. r ÷ 4

Kim read b books last month. This month she read 26 books. Which expression shows the total number of books Kim has read in the past two months?

A.
b × 26
B.
b ÷ 26
C.
b + 26
D.
b - 26

C. b + 26

A teacher prints off review packets for her classes. Each 6th-grade packet is 10 pages long and each 7th-grade packet is 12 pages long.

Which expression represents the total number of pages printed if there are p 6th-grade packets printed and r 7th-grade packets printed?

A.
(p + 10 x (r + 12)
B.
10p x 12r
C.
10p + 12r
D.
12p + 10r