The formula for finding the distance traveled, based on speed and time, is

d

=

r

t

d

=

r

t

, where

d is distance

r is rate (speed)

t is time

units must be consistent. if the unit for d is miles and the unit for t is minutes, what must the units for r be?

solve this formula for r.

r =

if a bicyclist rides for 160 minutes at an average speed of 17 miles per hour, how far was the ride, to 1 decimal place?

miles.

at what speed must a bicyclist ride to cover 12 miles in 1.5 hours, to 1 decimal place?

miles/hour.

Answer and explanation:

The formula for finding the distance traveled, based on speed and time, is

Where, D is distance , R is rate (speed)  and T is time

Units must be consistent.

1) Given : If the unit for D is miles and the unit for T is minutes.

To find : What must the units for R be?

Solution :

Now we put unit,

The unit of R is miles per minute.

2) Given : If a bicyclist rides for 160 minutes at an average speed of 17 miles per hour.

To find : How far was the ride ?

Solution :

Speed R=17 miles per hour

Time T=160 minutes

Convert into hours,

Substitute value in the formula,

The distance is 45.4 miles.

3) Given : A bicyclist ride to cover 12 miles in 1.5 hours.

To find : At what speed must a bicyclist ride ?

Solution :

Distance D=12 miles

Time T=1.5 hour

Substitute value in the formula,

The speed is 8 miles per hour.

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363