You have 3/4 cup of cornmeal in your cupboard. A recipe for muffins calls for 1/5 cup of cornmeal. How much cornmeal would you have left if you made the muffins?

11/20

Step-by-step explanation:

3/4 - 1/5 = 15/20 - 4/20 = 11/20

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)

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