Courtney and Kurtis are planning to travel 160 km in a car by travelling at x kilometres per hour for the first half of the distance, and then increasing their speed by 10 km/h to finish the distance. Which is the correct simplified expression for the total time of the trip?

Question

a)160x+800 divided by x(x+10)
b)80x+800 divided by x(x+10)
c)80x+800 divided by 2x+10
d)160x+800 divided by 2x+10

Answer 1

80/x + 80/(x+10)
(80(x+10)+80x) / x(x+10)
(160x+800) / x(x+10)