Which of the following is not equal to x^3
a. x^5 * x^-4 * x^2
b. x^-2 * x^9 * x^-4
c. x^0 * x^10 * x^-7
d. x * x^7 * x^4

look at photo

a

step-by-step explanation:

given the 2 equations

- x + y = - 2 → (1)

2x - 3y = 4 → (2)

multiplying (1) by 2 and adding to (2) will eliminate the x- term

- 2x + 2y = - 4 → (3)

add (2) and (3) term by term

(2x - 2x) + (- 3y + 2y) = (4 - 4), simplifying gives

- y = 0 ⇒ y = 0

substitute y = 0 in either of the 2 equations for corresponding value of x

substituting in (2) gives

2x = 4 ( divide both sides by 2 )

x = 2

solution is (2, 0 ) → a

answer: chelsea has 55 brushes

step-by-step explanation:

5 x 11 = 55

5 + 55 = 60

i’m kinda new to precal but your answer should be 21. hope i got it right.

step-by-step explanation: