Question

Spencer wants to burn 450 calories while biking. Biking burns about 10 calories per minute. When Spencer goes biking, he usually plans to stop and rest for about 15 minutes.

Complete the equation below to find the total number of minutes (including rest) that Spencer should plan to be out biking. Use m to represent the total minutes.

_ ( _ - _ ) = _

Answer 1

Answer:
`10(m-15)=450`

m=60 minutes

Explanation:

Let 'm' be the total number of minutes .

If Spencer usually plans to stop and rest for about 15 minutes.

Then the total time for biking=
`m-15`

Since biking burns about 10 calories per minute.

Total calories burn=
`10*(m-15)=10(m-15)`

As Spencer wants to burn 450 calories while biking.

It gives the equation
`10(m-15)=450`, where m is the total minutes.

To solve this divide both sides by 10, we get

`m-15=45\\\Rightarrow\ m=45+15\\\Rightarrow\ m=60\ minutes`