Chapter 1: Q9. (page 17)

Evaluate the expression when $x = 4 and y = 2$
localid="1648624612275" $3 x - 2 y$

Short Answer

Expert verified

The value of the expression is8.

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 from left to right

In order to evaluate the given expression, first substitute 4 for x and 2 for y and then multiply them with the numbers in front of them to get

$\begin{array}{l} 3 x - 2 y \\ = 3 (4) - 2 (2) \\ = 12 - 4 \end{array}$

Step-3 – Subtract the numbers

Now to simplify further, subtract the resulting numbers to get

$\begin{array}{l} 12 - 4 \\ = 8 \end{array}$

Thus, the value of the expression is 8.

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Evaluate the expression when $x = 4 and y = 2$
localid="1648624612275" $3 x - 2 y$

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Multiply from left to right

Step-3 – Subtract the numbers

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Evaluate the expression whenx=4andy=2localid="1648624612275" 3x−2y

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Multiply from left to right

Step-3 – Subtract the numbers

One App. One Place for Learning.

Most popular questions from this chapter

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Evaluate the expression when $x = 4 and y = 2$
localid="1648624612275" $3 x - 2 y$