Answer:
10 nickels
Step-by-step explanation:
If she has a maximum of 66 cents and 12 are pennies than you need to see how many nickels go into 54 cents. You can only get 50 cents with nickels so you will have 10 nickels and 12 pennies for a total of 22 coins and 62 cents.
38
mhmm
y+30
the sum of the numbers is 15y
the new sum after increase each number by 30 is 15y+450
the new mean 15y+450/15
= y+30