Richard and Teo have a combination age of 31. Richard is 4 years older than twice Teo's age. How old are richard and Teo?

Susan invests 3 times as much money at 11 % as she does at 7% . If her total interest after 1 year is $2000 , how much does she have invested at each rate?

The integers between - 10 and 10. Use set builder notation

Solve each system of equations using substitution. Show all work. 1) x - y = 2 4x - 3y = 11 2) - 2x + 3y = 14 x + 2y = 7 3) 6x - y = - 4 2x + 2y = 15

A circle has a circumference of 138.16 meters. What is the diameter of the circle?

A pop quiz consists of three true-false questions (with two possible answers each) and one multiple-choice question with five possible answers. The four questions are independent. How many different sets of answers are there?

What is an equivalent fraction for 1/3

Use the distributive property to simplify the expression. -7 (8x - 3) + x A. x + 10 B. - 15x + 4 C. - 9x - 4 D. - 55x + 21

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All of the following equations have the same solution except ___. 3m+2=-10 2-3m=-10. - 10=-3m+2. - 3m+2=-10

Solve the inequality for x. - 4x + 6 < 50