Write the expression in standard form by expanding and combining like terms.

9 (r - s) + 5 (2r - 2s)

A coffee mixture has beans that sell for $0.20 a pound and beans that sell for $0.68. If 120 pounds of beans create a mixture worth $0.54 a pound, how much of each bean is used? Model the scenario then solve it.

Which of the following arithmetic sequences have a common difference of? - 4,-1.5,1,3.5,6,8.5 1.5,3,4.5,6,7.5

What is the average of 3/7 and 3/14?

If the discriminant of a quadratic equation is equal to - 8, which statement describes the roots? A.) There are two complex roots. B.) There are two real roots. C.) There is one real root. D.) There is one complex root.

The area of a square is 36 square yards. How long is each side of the square?

Sid lives 3 miles north and 8 miles west of school. What is the direct distance from Sid's house to school? a. 11 miles b. 5 miles c. 36.5 miles d. 8.5 miles

6 (x-5) = 5 (x+5) 4y + 2 (-3 + 2y) = 1-y Solve the equations 4 (a-6) = 8a - (4a-24) 4 (2x-8) = 8 (x-8) 2 (3x-3) = - 6x-6 do these have no solution or are they an identity

Multiply and Simplify (-4) (x^8 - x - 4)

Michael and Angela each have a collection of candy. Michael tells Angela, "If you give me one piece of candy, then we'll have the same number." Angela replies, "But if you give me one piece, then I'll have twice as many as you.

To prepare for competitions your swimming coach required you to swim 8 lengths in the pool you swam 10 lenghts what percent of the required practice did you swim