Let n represent an unknown number. if n is double the size size of 10, which equation can be used to find it? a. 10 + 2 = nb. 10 - 2 = nc. 10 × 2 = nd. 10 ÷ 2 = nplz .. i'm going thru hell..

C. 10 × 2 = n

Step-by-step explanation:

n = unknown number

"Is"  means equals

"Double" means times 2

if n is double the  size of 10,

n = 2* 10

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.