Yesterday, Christine went on a bike ride. Her average speed was 10 miles per hour. Today, she went on another ride, this time averaging 13 miles per hour. In the two days, she biked for a combined total time of 11 hours. Let x be the number of hours she biked yesterday. Write an expression for the combined total number of miles she biked in the two days.

balafiavatv

balafiavatv

Answered question

2022-08-05

Yesterday, Christine went on a bike ride. Her average speed was 10 miles per hour. Today, she went on another ride, this time averaging 13 miles per hour. In the two days, she biked for a combined total time of 11 hours. Let x be the number of hours she biked yesterday. Write an expression for the combined total number of miles she biked in the two days.

Answer & Explanation

Cynthia Lester

Cynthia Lester

Beginner2022-08-06Added 22 answers

x+y = 11
y = 11-x
10*x + 13*y
= 10x + 13(11-x)
atestiguoki

atestiguoki

Beginner2022-08-07Added 5 answers

Yesterday she bicycled for x hours at a speed of 10 miles per hour.
Today she bicycled the remainder of 11 hours (11-x) at a speed of 13 miles per hour.
10 mi/hour * x hours + 13 mi/hour * (11-x) hours = 10*x mi + 143 mi - 13*x mi
Combining like terms, she rode a total of 143 - 3 * x miles

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