Which of the following is not a polynomial identity? A. a2 - a3 = (a - b)(a2 + ab + b2)
B. a2 - b2 = (a + b)(a - b)
C. (a2 + b2)(c2 - d2) = (ac-bd)2 + (ad + bc)
D. (a + b)2 = a2 + 2ab+ b2

mk./km: lm

step-by-step explanation:

,mlmlm

; mk

lk

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

uhhh idk u yolo?

a - base

b - exponent

so,