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

B) 0.40

Step-by-step 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

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!