Nina can ride her bike 63,360 feet in 3,400 seconds, and sophia can ride her bike 10 miles in 1 hour. what is nina’s rate in miles per hour if there are 5,280 feet in a mile?

Nina's rate is 12.7059 miles per hour (answer rounded up to four decimal places).

Step-by-step explanation:

Nina can ride her bike 63,360 feet in 3400 sec

1 mile = 5,280 feet

How many miles = 63,360 feet ?

Its 63,360 feet ÷ 5,280 feet × 1 mile = 12 miles

Nina's rate is 12 miles per 3400 seconds

1 hour = 3600 seconds

So in 1 hour, Nina rides × 12 miles = 12.7059 miles (rounded up to four decimal places)

Nina's rate is 12.7059 miles per hour (answer rounded up to four decimal places).

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )