A teacher has 21 red pens. If the ratio of red pens to blue pens she owned was 3:1, how many pens did she have total?

5x plus 8=3x minus 3 solve for x show your work

Marco has a credit with a company which charges 17% interest on any charges not paid at the end of the month. At the end of the first month, Marco paid off $1,410.28 of his 1,630.58 in charges. What is the total interest he will be charged

Jae's homework consists of 16 math problems. She has finished 4 problems so far. What percent of her homework has Jae completed?

The area of a living room is 24 square yards if the width is 12 feet what is the length of the living room in yards?

What is the simplified form of each expression? ( - h 4) 5

If h (x) = x+1, which option below give the formula for g

This table shows the area in inches of four rectangular scraps of fabric. What is the median Scrap Area (in²) A 84 B 72 C 80 D 84 of the sizes of the four scraps of fabric?

3x2 y4 z - 6xy - 3z (5x2) How many terms are in the expression? a. 1 b. 2 c. 3 d. 4

11 1/2 - 4 3/4 = ? I got 7 3/4 but i know that is wrong but I don't know how to do this problem?

Evaluate the expression x^2+5x-19 for x=-4