jim began a 183 mile bicycle trip to build up stamina for a triathlete competition. unfortunately his bicycle chain broke so he finished walking. the whole trip took 7 hours. if jim walks at a rate of 3 mph and rides at 39 mph, find the amount of time he spent on the bike

distance = speed * time

let 'x' represent the amount of hours Jim rode the bike, then '8-x' represents the number of hours he walked

183 = 31x+5(8-x)

Step-by-step explanation:x=5.5

8-5.5=2.5

Jim rode the bike for 5.5 hours and then walked for 2.5 hours.

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40