Question

1. Stuck in traffic , Mary drove 55 miles in 11 hours. What is the unit rate of her speed?

2.the ratio of apples to oranges is 3 to 15. If there are 60 oranges , how many apples are there???

Answer 1

I believe its 5 miles per hour

Answer 2

1. 5 miles/hour

2. 12 apples

Explanation:

1. Mary drove 55 miles in 11 hours.

To find the unit rate of her speed we will use the formula

Speed =
`(Distance)/(time)`

=
`(55)/(11)`

= 5 miles/hour

The unit rate of Mary's speed would be 5 miles per hour.

2. The ratio of apples to oranges = 3 : 15 =
`(3)/(15)`

=
`(1)/(5)`

Let the total number of apples be x.

Therefore,
`(x)/(60)` =
`(1)/(5)`

By multiplying with 60 on both the sides.

x =
`(60)/(5)`

x = 12

The number of apples are 12.