What equashion can be used to find two numbers those ratio are 3 to 2 and have the sum of 35

We need to set up a system, rather than a single equation, because there are two variables involved.

The first equation represents the fact that the two numbers are in a 3:2 ratio:

The second equation represents the fact that their sum is 35:

So, we have the following system:

Using the expression for x in the first equation, the second one becomes

which implies

the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.