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Chapter 1: Q85. (page 18)

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

1.5c-7

Short Answer

Expert verified

Expression 1.5c-7 results into -4.3

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 1.8 for c into given expression

1.5c-7=1.51.8-7

03

- Simplify 1.51.8-7

To evaluate, firstly perform multiplication and finally subtraction from left to right to get

1.51.8鈭�7=2.7鈭�7=鈭�4.3

Thus, 1.5c-7=-4.3

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