Question

On a cold January morning, the radiator fluid in Christine’s truck is –13°F. With the engine on, the temperature goes up by 3.6°F per minute. How long will it take the radiator temperature to reach 50°F?
Which expression tells how much the temperature needs to change from -13°F to 50°F?
Which expression tells how long it will take for the temperature to change?
How much time will it take for the temperature to change?

Answer 1

Answer:

Which expression tells how much the temperature needs to change from -13°F to 50°F?  

        50 - ( -13 )

Which expression tells how long it will take for the temperature to change?  

        50 - ( -13 ) ÷ 3.6

How much time will it take for the temperature to change?  

        17.5 minutes

Answer 2

Answer:

It will take 17.5 minutes to reach 50 degrees F.

Step-by-step explanation:

Current temperature = -13 degrees F

With the engine on, the temperature goes up by 3.6°F per minute.

Let us assume that it takes x minutes to reach 50 degrees F.

So, the time taken will be =

$-13+3.6(x)=50$

=> $3.6x=50+13$

=> $3.6x=63$

x = 17.5 minutes

The expression that tells how much the temperature needs to change from -13°F to 50°F is : $-13+3.6(x)=50$

It will take 17.5 minutes to reach 50 degrees F.