Assume you are driving on a two-mile circular racetrack. For the first half of the track, you average 30 miles per hour. What speed must you
maintain for the second half of the racetrack to average 60 miles per
hour?

15

step-by-step explanation:

isi

step-by-step explanation:

use that smart brain

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart