Which of the following statements contain a variable?

A) there are 12 inches in a foot

B) the length of the rope

C) she arrived at 2 o'clock

D) half the height of the building

30% of what number is 6

What does x•1+x/1 equal

A group of people bought movies tickets at the AMC Century City. They bought a total of 7 tickets, some adult and some kid tickets. They spent a total of $72. If adult tickets cost $12 and kid tickets cost $9, how much of each were purchased?

Round 16.7 to the nearest integer.

The areas of 10 cities are given in the table. How much greater is the range for the cities in the south than the cities in the north? Enter your answer in the box. Here's the table.

What is the answer of: 730/850x100

The remainder of 4 divided by 55

Solve the following system of equations using the elimination method. 5x - 5y = 10 6x - 4y = 4

Round 4.051 to the nearest hundredth

Round 4.88 to the nearest tenth