SOLUTION: Solve each problem. Answers could be rational expressions. Be sure to give your answers with appropriate units. 82.) Driving marathon. Felix drove 800 miles in x hours on Monday

Question 164557This question is from textbook Elementary and Intermediate
: Solve each problem. Answers could be rational expressions. Be sure to give your answers with appropriate units.
82.) Driving marathon. Felix drove 800 miles in x hours on Monday.
a.) Write a rational expression for his average speed.
b.) On tuesday he drove for 6 hours at the same average speed. Write a rational expression for his distance on Tuesday.
This question is from textbook Elementary and Intermediate

Answer by ptaylor(2198) (Show Source): You can put this solution on YOUR website!
Distance(d) equals Rate(r) times Time(t) or d=rt; r=d/t and t=d/r
Average rate(speed) is defined as the (total distance)/(total time)
a.) Average speed=(800 mi/x hr)=(800/x)mi/hr
b.) So, x=6, d=rt=(800 mi/x hr)*6 hr=(800/x) mi/hr*6 hr=(4800/x) mi
Hope this helps----ptaylor
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