Kim purchased white vases, red vases, and flowers to create centerpieces for an event. The flowers cost a total of $336 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?

Option A:

I and III only the answers.

Solution:

Let white vases be "w" and red vases be "r".

Cost of total flower = $336

Cost of each vase = $11

Total cost of the centerpieces

                = Cost of (white vases + red vases)  + Cost of flowers

                = 11(w + r) + 336

                = 11w + 11r + 336

Total cost of the centerpieces = 11w + 11r + 336 = 11(w + r) + 336

Therefore I and III only the answers.

Option A is the correct answer.

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