Answer:
The bag contains $2.39
Explanation 40% of 50 coins is 20 dimes which equals 2 dollars
8 percent is 4 pennies
2.00+ .04 is 2.04
Plus 7 nickels because there are 3 more nickels than pennies 7*5= 35
2.04+.35= 2.39
(14+19+x)/3=17
x= 18
the first is the equation and the second it the answer
Since the height and base are given those are the lengths of the 2 side lengths so to find the perimeter we do 4.8+4.8+8.4+8.4
the answer should be 26.4!