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Chapter 1: Q 123. (page 39)

In the following exercises, evaluate each expression.

9a-2b-8when a=-6 andb=-3

Short Answer

Expert verified

The value obtained is -56.

Step by step solution

01

Step 1. Given Information:

The given expression is 9a-2b-8and the value of the variables are a=-6and b=-3.

02

Step 2. Substitute the values:

Substitute -6for aand -3for binto the given expression 9a-2b-8.

9-6-2-3-8

03

Step 3. Multiply:

Perform multiplication from left to right in the obtained expression. Use the fact that the product of two negative numbers is again a negative number.

-54--6-8

04

Step 4. Subtract:

Subtract -6from -54in the obtained expression.

-54--6-8=-54+6-8=-48-8

05

Step 5. Subtract:

Subtract 8 from -48in the obtained expression.

-48-8=-56

06

Step 6. Conclusion:

The value obtained is -56.

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