Which algebraic expression is equivalent to the expression below? (3x + 12) + 8x a. (3x + 8x) + 12 b. (3x - 8x) + 12 c. 23x d. (3x + 12x) + 8

The length of each stair is 11 inches. what is the rise, r, for each stair? round to the nearest inch. 2 inches 7 inches 17 inches 24 inches

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1