P = 40p given
S = 260p given
C = 15(P + S) given
C = 15(40p + 260p) substitute
Can you simplify?

Mark M.
tutor
"Simplify" means to rewrite with as few symbols as possible.
This can be done by adding/subtracting, multiplying/dividing.
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01/11/17
Pinkie P.
01/11/17