Question #f750c

1 Answer
mimi
Dec 12, 2017

#20x+30#

Explanation:

Since the number of t-shirts is the same as the number of sweatshirts, they use the variable #x# to represent the number of t-shirts and number of sweatshirts, respectively.

To find the TOTAL COST of manufacturing the SAME NUMBER of t-shirts and sweatshirts, we can add the two cost functions together.

#T(x)+S(x)=(5x+12)+(15x+18)#

Simplify.
#T(x)+S(x)=20x+30#

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