Question

At a snack bar, each medium drink costs $1.85 and each large drink cost c more dollars than a medium drink. If 5 medium drinks and 5 large drinks cost a total of $20.50, what is the value of c?

A) 0.45
B) 0.40
C) 0.30
D) 0.25

Answer 1

B) 0.40

Explanation:

m = 1.85

l = 1.85 + c

With 5 medium drinks and 5 large drinks:

C = 5m + 5l

20.5 = 5(1.85) + 5(1.85 + c)

20.5 = 9.25 + 9.25 + 5c

20.5 = 18.5 + 5c

5c = 20.5 - 18.5

5c = 2

c = 2/5 = 0.4