Which of the following statements about a variable are true?

A variable cannot be subtracted.

A variable is represented by a letter.

A variable represents a quantity.

A variable cannot be multiplied.

The population of fish in a certain lake increased from 350 to 430 over the months of March and April. At what rate is the population increasing?

What is the property of (18+13) - 13 and 18

A rope is 544 feet long. If it is cut into pieces 2 feet long, how many pieces will there be

Jamal bought a 2 liter bottle of soda for 1.96. what is the cost per liter

Jessica can do 60 jumping jacks in 2 minutes. Juanita can do 150 jumping jacks in 5 minutes. Are these rates proportional? Explain your reasoning.

Randi earned a profit of $60.00 on her last snow shoveling and salting job. Write an equation that can be solved to find how many hours Randi spent shoveling and salting to earn a profit of $60.00. HINT: Randi charges $25 an hour to shovel and salt.

The lengths of the sides of a triangle are 4, 5, 6. Can the triangle be a right triangle?

Name a big reason Europeans came to the "New World" during the fifteenth and sixteenth centuries?

Find the value of x 2x+4x=5

UT bisects WV. WV = ? A. SV B. 2 (SV) C. UT D. none of the above