Answer: 7C+84
Explanation:
Distributive property : a(b+c) = ab+ac , where a,b,c, are any expressions.
Given : A restaurant uses C cups of flour for baking rolls and 12 cups of flour for baking pies.
i.e. Number of cups of flour used for baking rolls per day = C
Number of cups of flour used for baking pies per day = 12
Total flour used each day= C+12
Now , total flour used in 7 days = 7 x (Total flour used each day)
= 7 (C+12)
= 7C +7 (12) [By distributive property]
= 7C+84
Hence, the expression for how much flour the restaurant uses in seven days : 7C+84