Question

Unit 3, Lesson 7

practice Problems
A car travels 55 miles per hour for 2 hours. Complete the table.
time (hours)
distance (miles)
1
55
110​

Answer 1

Find the complete table in attached file.

Explanation:

Find the Incomplete table in attached file

Given:

A car travels 55 miles per hour for 2 hours.

So the speed of the car 55 miles per hour is constant for 2 hours.

Using speed formula.

`Speed=(distance)/(time)`

Second row.

From the second row of the table
`time = (1)/(2)=0.5\ sec` and speed is constant
`speed = 55\ mi/hr`, so we need to find only distance.

`Speed=(distance)/(time)`

`55=(distance)/(0.5)`

`distance = 55* 0.5`

`distance = 27.5\ mi`

Third row.

From the third row of the table
`time =1(1)/(2)=(3)/(2) = 1.5\ sec` and speed is constant
`speed = 55\ mi/hr`, so we need to find only distance.

`Speed=(distance)/(time)`

`55=(distance)/(1.5)`

`distance = 55* 1.5`

`distance = 82.5\ mi`

Fourth row.

From the fourth row of the table
`distance =110\ miles` and speed is constant
`speed = 55\ mi/hr`, so we need to find time.

`Speed=(distance)/(time)`

`time=(distance)/(speed)`

`time=(110)/(55)`

`time = 2\ sec`

Therefore we complete the table from the above calculation.