Question

4. (2 pts) A roll of 32 bills contains only $5 bills and $10 bills. If the value of the roll is $220,then how many of each bill are in the roll?

Answer 1

Given:

Total number of bills is, N = 32.

Total cost of the bill is, C = $220.

The first type of bill contans $5 bills and second type of bill contains $10 bills in the roll.

Explanation:

Consider the numer of $5 bills as x and $10 bills as y.

Then, the equation for total number of bill can be written as,

$\begin{gathered} x+y=N \\ x+y=32 \\ x=32-y\text{. . . . . . . (1)} \end{gathered}$

Similarly the total cost of the bill can be written as,

$undefined$