Aquarterly telephone bill consist of n$79.15 rental plus 4.7 cents for each dialled unit. sales tax is added at 15%. what is the total bill for mrs. jones who used 915 dialled units?

$140.48

Step-by-step explanation:

Let x represent dialed units.

We have been given that a quarterly telephone bill consist of $79.15 rental plus 4.7 cents for each dialed unit.

4.7 cents = $0.047

Cost of dialing x units would be .

Total cost of dialing x units would be .

Let us find cost of dialing 915 units by substituting in above expression.

Now, we will find 15% of sales tax as:

Total bill:

Therefore, Mrs. Jonas's bill would be $140.48.