Chapter 1: Q7. (page 17)

Evaluate the expression when $x = 4 and y = 2$
localid="1648624430882" $1.2 (x + 3)$

Short Answer

Expert verified

The value of the expression is8.4.

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 – Solve the expression inside grouping symbols

In order to evaluate the given expression, first substitute 4 for x and then simplify the expression inside the parenthesis first.

So, add the numbers inside the parenthesis to get

$\begin{array}{l} 1.2 (x + 3) \\ = 1.2 (4 + 3) \\ = 1.2 (7) \end{array}$

Step-3 – Multiply and divide from left to right

Now to simplify further, multiply the resulting numbers to get

$\begin{array}{l} 1.2 (7) \\ = 8.4 \end{array}$

Thus, the value of the expression is 8.4.

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Evaluate the expression when $x = 4 and y = 2$
localid="1648624430882" $1.2 (x + 3)$

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Solve the expression inside grouping symbols

Step-3 – Multiply and divide from left to right

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Evaluate the expression when x=4andy=2localid="1648624430882" 1.2(x+3)

Short Answer

Step by step solution

Step-1 – Order of operations

Step-2 – Solve the expression inside grouping symbols

Step-3 – Multiply and divide from left to right

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="1648624430882" $1.2 (x + 3)$