Answer:
Beka and Melannie have 17 nickels.
Explanation:
Given:
Total number of nickels ans dimes =28
Total value of coins = $1.95
To find number of nickels.
Let number of nickels be =

So, number of dimes =

1 nickel = $0.05
Value of
nickels in dollars =

1 dime = $0.10
Value of
dimes in dollars =

Total value of nickels and dimes in dollars =

So we have:

Subtracting 2.8 from both sides.


dividing both sides by -0.05

∴

∴ Beka and Melannie have 17 nickels.