Aaron was making fruit punch for his study group. He used 6 cups
of orange juice, 11/2 cups of lemon juice and 3/4 cups
of pineapple juice. How many total cups of liquid did
Aaron mix altogether?

12 1/4 cups

Step-by-step explanation:

11/2 = 5.5 cups

5.5 + 3/4=6.25 (which is basically,6 1/4)

6 1/4 + 6 = 12 1/4 cups

true

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional