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Chapter 1: Q8. (page 17)

Evaluate the expression when x=4andy=2

localid="1648624505758" 1.2x+3

Short Answer

Expert verified

The value of the expression is7.8.

Step by step solution

01

Step-1 – Order of operations

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

Step-2 – Multiply

In order to evaluate the given expression, first substitute 4 for x and then simplify the expression further by multiplying the first two numbers as shown below

1.2x+3=1.2(4)+3=4.8+3

03

Step-3 – Add the numbers

Now to simplify further, add the resulting numbers to get

1.2x+3=1.2(4)+3=4.8+3=7.8

Thus, the value of the expression is 7.8.

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