Write an expression that gives the value of the quantities asked for. Then pick a reasonable value for each variable, substitute it into the expression, and evaluate.
31. If t gives the number of hours you have hiked at s mi/hr, what is the distance remaining on a hiking trip 28 mi long?
32. If Jane studied a hours and b minutes, how long in hours did she study?
31. distance remaining (in miles) = 28 - s t
32. a + (b/60) hours