other formulas

Millie the waitress gets
$2.85 per hour plus tips at her job.
The formula is
Pay = 2.85 x hours + tips

p = 2.85h + t

A cost of a taxi ride is calculated by
adding a fixed rate to the product of
a charge per tenth of a mile times
the distance traveled.

C = f + rd

Simple interest on a bank loan can be calculated by multiplying the
principal times the interest times the time.

I = prt

Use the above formulas to answer these questions.

Millie worked 8 hours and
got $46 in tips.
What is her pay?

h h=8 , t = 46

A cab ride cost $1.25 fixed cost. It has a rate of $0.15 per tenth of a mile. How much will a ride of 36 tenths of mile cost?

f = 1.25, r = 0.15, d =36

The interest rate on a loan is 0.04. The time of the loan is 5 years. The amount or principal is $2000. What is the interest?

p = 2000, r = 0.04, t = 5

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