Answer:
He has 10 pennies and 13 nickels.
Step-by-step explanation:
A nickel is worth 0.05 while a pennie is worth 0.01. Since Ryah has 0.75 in nickels and pennies, then the amount he has can be described by the following equation:
0.05*nickel + 0.01*pennie = 0.75
We know that he has 3 times more nickels than pennies, therefore:
nickel = pennie + 3
Using that information on the first equation we have:
0.05*(pennie+3) + 0.01*pennie = 0.75
0.05*pennie + 0.15 + 0.01*pennie = 0.75
0.06*pennie = 0.75 - 0.15
0.06*pennie = 0.6
pennie = 10
nickel = 10 + 3 = 13
He has 10 pennies and 13 nickels.
