Chapter 1: Q58. (page 36)

Evaluate the expression when $x = 6 and y = 12$ . (Lesson 1.3)
localid="1647503467763" $3 (x + y)$

Short Answer

Expert verified

The value of the expression is54.

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 – Evaluate expression inside grouping symbol

To evaluate the expression $3 (x + y)$ , substitute 6 for x and 12 for y in the given expression and simplify the expression inside the parenthesis as follows

$\begin{matrix} 3 (x + y) = 3 (6 + 12) \\ = 3 (18) \end{matrix}$

Step-3 – Multiply the numbers

Now to simplify further, Multiply the numbers to get

$\begin{matrix} 3 (x + y) = 3 (18) \\ = 3 \cdot 18 \\ = 54 \end{matrix}$

Thus, the value of the expression is 54.

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Evaluate the expression when $x = 6 and y = 12$ . (Lesson 1.3)
localid="1647503467763" $3 (x + y)$

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Evaluate expression inside grouping symbol

Step-3 – Multiply the numbers

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Evaluate the expression when x=6andy=12. (Lesson 1.3)localid="1647503467763" 3x+y

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Evaluate expression inside grouping symbol

Step-3 – Multiply the numbers

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Discrete Mathematics

Pure Maths

Probability and Statistics

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Study anywhere. Anytime. Across all devices.

Evaluate the expression when $x = 6 and y = 12$ . (Lesson 1.3)
localid="1647503467763" $3 (x + y)$