Question

A person drives 300 miles at a constant speed of 55 mph. The equation R-300-55h

represents the number of miles remaining after / h hours

Answer 1

h = - \frac{R}{55}

55

R

+ \frac{60}{11}

11

60

Explanation:

The expression is given as:

R = 300 - 55h

Solving for h implies making h the subject of the expression:

R = 300 - 55h

First add -300 to both sides of the expression;

R + (-300) = 300 - 55h + (-300)

R - 300 = -55h

Now divide through by (-55)

\frac{R}{-55}

−55

R

- \frac{300}{-55}

−55

300

= \frac{-55h}{-55}