Question

The current number of coupons being mailed out by a company each week in one region of the country can be represented by the function R(x) = 3x2 + 21x, where x is the number of cities in the region. The number of coupons in a new mailing sent only to preferred customers can be represented by the function P(x) = 9x.
Which function best describes C(x), the number of coupons that are shipped out in any given week?
A.
C(x) = 3x2 + 30x

B.
C(x) = 12x2 + 21x

C.
C(x) = 3x2 + 12x

D.
C(x) = -6x2 + 21x

Answer 1

its (a) because (a) is C(x)=3x4+30x and 9+21 is 30 so its 3x2+30