Question

1. you want to know the number of minutes that you can use on your $45.00 phone card. the card company charges you $0.50 for the first minute and $0.05 for each additional minute. solve the formula $45.00 = $0.50 + $0.05m for m. justify each step with an algebraic property of equality.

Explanation:

Step1: Subtract 0.50 from both sides (Subtraction Property of Equality)

$45.00 - 0.50 = 0.50 + 0.05m - 0.50$
Simplify: $44.50 = 0.05m$

Step2: Divide both sides by 0.05 (Division Property of Equality)

$\frac{44.50}{0.05} = \frac{0.05m}{0.05}$
Simplify: $m = 890$

Answer:

$m = 890$