Equivalent expression for 7a+21

The value of 528 would change by how much if 6 replaced 2

A chemical company makes two brands of antifreeze. The first brand is 45% pure antifreeze and the second brand is 70% pure antifreeze.

Solve for x 12x/5 a. x=-71/2 b. x=71/2 c. x = 43 1/5

You're giving a side length of 7 cm. How many equilateral triangle's can you construct using this information

Wich speed is fastest 18feet in 20minuts. 90 feet in 2.5hours and 20 yards in 1.5 hours

Multiply and simplify: 10x (9x^2 + 6x + 7)

B ∩ U A = U (B ∩ A).

Kylee bought a pack of 12 cookies. one-third if the cookies are peanut butter. How many of the cookies in the pack are peanut butter?

How do you know the opposite of a nonzero integer?

The mileages of cars in a fleet of cars are normally distributed with a mean mileage of 52,000 miles and a standard deviation of 2,000 miles. What is the probability of randomly selecting a car with a mileage less than 52,000 miles?