4) find the maximum value of the function x2 +9x -3 f(x) =- 4) (a) 2/3 (b) 1 (c) 7.75 (d) 16 (e) none of the above

hi there!

the answer will be d: 2

answer: 193

explanation:

200-7 = 193

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