Question

What are the answers

Answer 1

see below

Explanation:

6) 15 sit-ups a minute 225 sit-ups in 15 minutes

7) $13 per book $130 for 10 books

8) 55 miles per hour 13,750 miles in 250 hours

9) 65 beats per minute 520 beats in 8 minutes

10) 13 laps per minute 260 laps in 20 minutes

Answer 2

6. Unit rate -
`(15 sit-ups)/(1 min)`

`(225 sit-ups)/(15 mins)`

Explanation:

The unit rate is the number of items/actions/miles etc within 1 unit. Many examples are around us and can include miles per 1 hour or cost per one unit at the grocery store. We can find unit rate by dividing the quantity in the numerator by quantity in the denominator. Our result should give us a new denominator of 1 to be a unit rate.

For instance, sit-ups per minutes is sit-ups/minute. In the table, it says,
`(45 sit-ups)/(3 mins)`,
`(90 sit-ups)/(6 mins)`, and
`(120 sit-ups)/(8mins)`. We pick one to divide.

`(45 sit-ups)/(3 mins)`

`(15 sit-ups)/(1 min)` - this is the unit rate.

We can then multiply our unit rate to find the amount for any number of minutes. For 15 minutes, I multiply
`(15 sit-ups)/(1 min)` by 15 which is
`(225 sit-ups)/(15 mins)`