Which value of x satisfies both -9x + 4y = 8 and -3x − y = 4 given the same value of y? a.) -1/7 b.) -7/9 c.-8/7 /3

Solve for x and select the correct answer

Simplify (8x2 − 1 + 2x3) − (7x3 − 3x2 + 1). −5x3 + 11x2 − 2 5x3 − 11x2 + 2 x3 + 2x2 + x3 x3 − 2x2 − x3

The height of a plant, in inches, p years after planting it is given by the polynomial function r(p) = -2p% + 270p. find the height of the plant when p = 90 years.