X+3X+7 when x equals 9

The area of a rectangle court is 433.37 Square meters and the length of the court is 28.7 meters. What is width of the court?

Determine which of these does NOT illustrate two quantities that combine to make 0. A) Jane collects 12 seashells and then loses 12. B) Sharon lost 8 pounds and then gained 10 pounds. C) A business's profit if its income is equal to its expenses.

Keiko runs 8 miles in 59 minutes. how many miles does she run per minute?

Crystal invites $1100 in one account and $1900 in an account paying 3% higher interest. At the end of one year she had earned $117 in interest. At what rates did she invest?

Anna found the difference between thirteen and the product of four and a number. Which expression represents this phrase, and what is its value if n = 3?

Convert 30/20 into decimal

2 (m+1) = 16 me ajuda por favor

Classify each polynomial by its degree and number of terms. 7/4x+3 5.2x^2-4x=2.5 3/5 0.75x^2

Claire wants to place a mirror that is 1812 inches wide in the center of a wall that is 31 inches wide. How far from each corner should she place the mirror for it to be centered.

Three times the sum of a number and three