If m(x) = x2 + 3 and n(x) = 5x + 9, which expression is equivalent to (mn)(x)? a. 5x3 + 9x2 + 15x + 27 b. 25x2 + 90x + 84 c. x2 + 5x + 12 d. 5x2 + 24

A

Step-by-step explanation:

m(x) = x² + 2  

n(x) = 5x + 9

(m*n)(x) = (x² + 3)(5x + 9)

            = x²(5x + 9) + 3(5x + 9)

            = 5x³ + 9x² +  15x + 27

why do wages differ across industries

step-by-step explanation :

micro economists are concerned with economics on an industry or individual firm basis.

macro economists are concerned with national and international level

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12