Chapter 1: Q. 14MCQ (page 27)

Evaluate the expression when $x = 20 and y = 5$ .
$0.5 x + y$

Short Answer

Expert verified

The value of the expression is15.

Step by step solution

. 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 given expression $0.5 x + y$ , substitute 20 for x and 5 for y and simplify further as shown below

$\begin{matrix} 0.5 x + y = 0.5 (20) + 5 \\ = 10 + 5 \end{matrix}$

. Add the numbers

Now to simplify further, add the numbers to get

$\begin{array}{l} 10 + 5 \\ = 15 \end{array}$

Thus, the value of the expression is 15.

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Evaluate the expression when $x = 20 and y = 5$ .
$0.5 x + y$

Short Answer

Step by step solution

. Order of operations

Step 2 . Multiply from left to right

. Add the numbers

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Evaluate the expression whenx=20andy=5.0.5x+y

Short Answer

Step by step solution

. Order of operations

Step 2 . Multiply from left to right

. Add the numbers

One App. One Place for Learning.

Most popular questions from this chapter

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Evaluate the expression when $x = 20 and y = 5$ .
$0.5 x + y$