If 20% of a number is 30, what is 50%

Dan has 340 dollars to spend on 9 book. After buying them he had 16 dollars. How much did each book cost? Answer with an equation.

A student reader is making $5.90 per hour and gets a $0.52 raise. what is the percent increase? (round to the nearest tenth of a percent.)

You by x packs of pencils, twice as many packs of erasers, and three times as many rolls of tape. Write an expression in the simplest form for the total amount of money you spent.

Each batch of oatmeal cookies needs 3/5 of a cup of raisins. If you cut the recipe in half, how many cups of raisins are needed?

Do you want to buy a pair of skates that originally cost $135. The sales tax is 5.5% and it will be applied to the sale price. What is the total cost?

Find the unit rate for 200 miles in 4 hours

If x= -6 and y = 2, evaluate the following expression: x²y + x . .

Simplify - 5 [-9 (-9) ]

What is a irrational number by a circumference

Which is irrational A) - 2.13 B) 0.3 C) square root of 7