Stephen paid $340 for a $320 sofa. The extra amount was for tax. What was the percentage of tax for the sofa?

Yuko wants to take a job selling cars. Since she will get a commission for every car she sells, she finds out the sale price of the last four cars sold at each company.

The product of two consecutive positive even integers is 360

Looking at the playground, I saw boys and dogs. Counting heads, I got 22. Counting legs I got 66. How many boys and how many dogs are there?

3,254,107 what digit is in the hundred thousands place

An architect finds some unlabeled dimensions on a blueprint, and no scale is shown. A 14-foot wall that has already been built measures 2 inches on the drawing. A new wall that has to be built measures 6 inches on the drawing.

A certain type of bacteria, given a favorable growth medium, doubles in population every day. If you begin with 10 bacteria, how many days will it take for the population to reach 20,000

If you wanted to find the depth of a submarine during a dive, would it be more reasonable to use an equation with the rate in feet per minute or feet per hour? Explain your reasoning.

What value of satisfies the equation 2n-3 (4n+5) = -6 (n-3) - 1

A supplier has delivered 9 pallets of material to the hardware store. The delivery needs to be inventoried in 1.5 hours. How many pallets must be inventoried per hour?

Solve x for 3 х - 1 = - 13