math HELP!
posted by max on .
Kara's custom tees experienced fixed costs of $300 and variable costs of $5 a shirt. write and equation that can be used to determine the total expenses encountered by kara's custom tee's. Let x be the number of shirts and let C(x) be the total cost of producing x shirts. then, C(x)=? and then the cost of producting 5 shirts is ?

C(x) = 300 + 5x
Insert 5 for x and calculate. 
300+5*5

25

5