The distance needed for a car to stop depends on how fast the car is travelling. This distance can be calculated by adding the thinking distance and the braking distance. For example: at 30 miles per hour Here are the formulae to work out the thinking distance and the braking distance for a car travelling at miles per hour. Thinking distance = feet Braking distance = feet A car is travelling so that its braking distance is 125 feet. How fast is the car travelling? miles per hour

Missing Parts

Here are the formulae to work out the thinking distance and the braking distance for a car traveling at V miles per hour.

Thinking distance = V feet

(a) A car is traveling at 70 miles per hour. What is the total stopping distance for this car? feet

(b) A different car is traveling so that its braking distance is 125 feet. How fast is the car traveling? miles per hour

(a)2520 feet

(b)50mph

Step-by-step explanation:

Total Stopping Distance = Thinking Distance + Braking Distance

Given that for a car traveling at V miles per hour:

Thinking distance = V feet

We have:

(a)V=70 miles per hour

The total stopping distance for a car traveling at 70 miles per hour is 2520 feet.

(b)

Braking Distance = 125 feet

Therefore:

A car with a braking distance of 125 feet is traveling at a speed of 50mph.

x is greater than 5

step-by-step explanation:

2x+7 is greater than 17

    -7                           -7

2x is greater than 10

divide by 2 each side

x is greater than 5

replication and blocking

step-by-step explanation: