Question

Suppose that during one period of extreme cold, the

average daily temperature decreased 15 °F each day.

How many days did it take for the temperature to

decrease by 9 °F?

Answer 1

6 Days

Explanation:

Let the number of days be
`x`.

Given:

Daily temperature decreased by 1.5 °F in each day.

So, the temperature decreased in
`x` days is
`1.5x`.

Therefore the temperature decreased by 9 °F in
`1.5x` days.

The equation is
`1.5x=9`

`x=(9)/(1.5)`

`x=6`

The temperature decreased by 9 °F in 6 days.