Elena bikes 20 minutes each day for exercise. Write an equation to describe the relationship between
her distance in miles, D, and her biking speed, in miles
per hour, when she bikes at a constant speed of 15
miles per hour for the first 5 minutes, then at 12 miles
per hour for the last 15 minutes.

$6.42

step-by-step explanation:

your answer is

a.

5

step-by-step explanation:

46

step-by-step explanation:

given

height = 168 cm

formula

height =2.47*f+54.13

solution

168 = 2.47f + 54.13             subtract 54.13 from both sides

168 - 54.13   = 2.47f             combine

113.87 = 2.47f                     divide by 2.47

113.87 / 2.47 = f                   combine

46.1 = f  

answer: 46 cm