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Chapter 1: Q 1.46. (page 36)

The temperature in Denver was -6 degrees at lunchtime. By sunset, the temperature had dropped to-15 degrees. What was the difference in the lunchtime and sunset temperatures?

Short Answer

Expert verified

The difference in temperatures is 9 degrees.

Step by step solution

01

Step 1. Given Information.

The temperature is given to be -6degrees at lunchtime.

The sunset temperature is given to be -15degrees.

02

Step 2. Identify the quantity asked and write a phrase.

It is required to calculate the difference between lunchtime and sunset temperatures.

The lunchtime temperature is -6degrees and the sunset temperature is-15degrees.

So, it is required to calculate the difference of-6and-15.

03

Step 3. Translate the phrase into a mathematical expression. 

The phrase "The difference of aand b" indicates the subtraction operation and is represented as a-b.

Write the phrase "The difference of -6and -15" as a mathematical expression.

-6--15

04

Step 4. Calculation.

Subtract -15from -6.

-6--15=-6+15=9

05

Step 5. Conclusion.

The difference in temperatures is 9 degrees.

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