Chapter 1: Q8. (page 17)

Evaluate the expression when $x = 4 and y = 2$
localid="1648624505758" $1.2 x + 3$

Short Answer

Expert verified

The value of the expression is7.8.

Step by step solution

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.

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

$\begin{matrix} 1.2 x + 3 = 1.2 (4) + 3 \\ = 4.8 + 3 \end{matrix}$

Step-3 – Add the numbers

Now to simplify further, add the resulting numbers to get

$\begin{matrix} 1.2 x + 3 = 1.2 (4) + 3 \\ = 4.8 + 3 \\ = 7.8 \end{matrix}$

Thus, the value of the expression is 7.8.

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Evaluate the expression when $x = 4 and y = 2$
localid="1648624505758" $1.2 x + 3$

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Multiply

Step-3 – Add the numbers

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Evaluate the expression when x=4andy=2localid="1648624505758" 1.2x+3

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Multiply

Step-3 – Add the numbers

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Decision Maths

Probability and Statistics

Calculus

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Theoretical and Mathematical Physics

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Study anywhere. Anytime. Across all devices.

Evaluate the expression when $x = 4 and y = 2$
localid="1648624505758" $1.2 x + 3$