Chapter 1: Q57. (page 36)

Evaluate the expression when $x = 6 and y = 12$ . (Lesson 1.3)
localid="1649147484508" $3 x + y$

Short Answer

Expert verified

The value of the expression is30.

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

To evaluate the expression $3 x + y$ , substitute 6 for x and 12 for y in the given expression and simplify further as shown below

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

Step-3 – Add the numbers

Now to simplify further, add the numbers to get

$\begin{matrix} 3 x + y = 18 + 12 \\ = 30 \end{matrix}$

Thus, the value of the expression is 30.

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Evaluate the expression when $x = 6 and y = 12$ . (Lesson 1.3)
localid="1649147484508" $3 x + y$

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Multiply from left to right

Step-3 – Add the numbers

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Evaluate the expression when x=6andy=12. (Lesson 1.3)localid="1649147484508" 3x+y

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Multiply from left to right

Step-3 – Add the numbers

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Geometry

Calculus

Statistics

Logic and Functions

Probability and Statistics

Pure Maths

Study anywhere. Anytime. Across all devices.

Evaluate the expression when $x = 6 and y = 12$ . (Lesson 1.3)
localid="1649147484508" $3 x + y$