Question

B) f(x) = (10 - 3x)(4 - 5x)

Answer 1

x=10/-3, 4/5

Explanation:

f(x) = (10 - 3x)(4 - 5x)

10-3x=0

-3x=-10

x=10/3

4 - 5x = 0

-5x = -4

x = 4/5

Answer 2

15x2 - 62x + 40

Explanation:

(10 - 3x)(4 - 5x)= 10 x 4 + 10 x -5x - 3x x 4 - 3x x -5x = 15x2 - 62x + 40

f(x) is a parabola, now you have to graph