Question

Kim purchased white vases, red vases, and flowers to create centerpieces for an event. The flowers cost a total of $318 and each vase cost $11. If w and r represent the number of white and red vases purchased, respectively, which of the following expressions represents the total cost of the centerpieces?

I.
II.
III.
IV.
A.
I, II, and III only
B.
II and IV only
C.
I only
D.
I and III only

Answer 1

I can't see the expressions I–IV in your message. The total cost is

11w + 11r + 318,

which is equivalently written as

11(w + r) + 318.

Any expression algebraically equal to that is correct; any expression that multiplies the 318 by 11 (for example 11(w + r + 318)) or omits a term is not.

Please paste the four expressions I–IV and I'll tell you which choice (A–D) is correct.