The average of three numbers is 15. what is two times the sum of the the three numbers?
show how you did it~ > _

Average is the sum divideided by the number of numbers added together

so avarage of 3 number is 15 means
three numbers represented as x+y+z so
= 15
(x+y+z)/3=15
multiply both sides by 3 to clear fraction
x+y+z=45
45 is the sum of the 3 numbesr
double of that is
45 times 2=90

If three numbers average 15, then their sum is 45. Two times 45 is 90.

The answer would be $68.04