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Chapter 1: Q86. (page 18)

PREREQUISITE SKILL

Evaluate each expression if a=2,b=-34,and c=1.8.

86. -9a-6

Short Answer

Expert verified

Expression -9a-6 results into 36

Step by step solution

01

- Order for simplification 

To evaluate any expression involving more than one operation, follow the below order of operations:

  • First evaluate expressions inside grouping symbols like parentheses ( ) or brackets [ ].
  • Evaluate the exponents.
  • Perform Multiplication and division from left to right.
  • Perform addition and subtraction from left to right.
02

- Substitute given values

Substitute 2 for a into given expression

-9a-6=-92-6

03

- Simplify -92-6

To evaluate, firstly simplify parentheses then perform multiplication as shown below

−92−6=−9−4=36

Thus, -9a-6=36

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