Question

Sameer woke up one morning and saw frost on the windows. It was -7°C outside. Later in the day, the frost melted. At 3 p.m. it was 2°C outside. Which expression represents the difference between the two temperatures?

Answer 1

`d = 9`

Explanation:

Given

`Morning = -7^(\circ)C`

`Afternoon = 2^(\circ)C`

Required

What represent the difference

The expression that represents the difference (d) are:

`d = |Morning - Afternoon|`

Substitute values for Morning and Afternoon

`d = |-7 - 2|`

`d = |-9|`

`d = 9`