Solve A = 1/2(b + c)h for c.

2A/h - b =  c

Step-by-step explanation:

A = 1/2(b + c)h

Multiply each side by 2

2A = (b + c)h

Divide each side by h

2A/h = (b + c)h/h

2A/h = (b + c)

Subtract b from each side

2A/h -b = (b-b + c)

2A/h - b =  c

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.