James started walking away from his house. He started 3 ft away from his front door. He then walked another unknown distance North or South. If North is represented positively and South is represented negatively, which function BEST represents how far James is away from his house? A) f(x) = |x| + 3
B) f(x) = |x - 3|
C) f(x) = x(-x) + 3
D) f(x) = 3x - (x - 3)

a) 7x=7

step-by-step explanation:

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

2b2t

step-by-step explanation:

2b2t