Answer:
let cow=x and chickens =y
cows have 4 legs, 4x. chickens have 2 legs, 2y
Factor x^3 -2x^2-9x+18
= x^2(x - 2) - 9(x - 2)
= (x^2 - 9)(x -2)
= (x + 3 )(x - 3)(x - 2)
So (x+3) is a factor
42
Step-by-step explanation:
Given m and n are parallel:
x + 138 = 180 because these angles are supplementary
subtract 138 from both sides
x = 42