Explanation

Set up a proportion and solve.

\(\frac{\text{solution}}{\text{water}} = \frac{1}{5}=\frac{x}{5}\) \(5x = 20 \)

\(x = 4\) So, 4 gallons of solution should be mixed with 20 gallons of water.

Danny worked 40 hours and earned \(\$6.30\) per hour. His friend Erica earn \(\$8.40\) per hour at her job. How many hours would Erica have to work in order to equal Danny’s earnings for 40 hours?

If \(q>0\) and \(q=q^{-4}\) ,what is the value of q?

Two adults and four children pay \(\$48\) to get into the fair. A child’s ticket is \(\$6\) less than an adult’s ticket. What is the cost of an adult’s ticket?

A clerical assistant earns \(\$45.20\) in 8 hours. At this rate, how much does he earn in 40 hours?