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Chapter 1: Q76. (page 24)

Which of the following is the value of the expression x+-5whenx=5?

F.鈭�5G.0H.5I.10

Short Answer

Expert verified

The value of the expressionis 10.

Step by step solution

01

Step-1 – Absolute value of a number

Absolute value of any positive or negative number is always positive and equal to the magnitude of the number. The absolute value of a number N is denoted by N.

The absolute value of a number represents the distance of the number from 0 in the number line.

02

Step-2 – Example of Absolute value

The absolute value of 3 is denoted by 3and is equal to 3.

And the absolute value of -4is denoted by -4and is equal to 4.

03

Step-3 – Evaluate the expression

To evaluate the value of the expression x+-5, substitute 5 for x and simplify further as shown below,

x+鈭�5=5+鈭�5=5+5=10

Thus, the value of the given expression is 10.

Hence option (I.) is correct.

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Most popular questions from this chapter

Describe in order the steps you would take to evaluate the expression

12(x鈭�3)2鈥�when鈥�x=5

State the absolute value and the opposite of the number.

3

Critical thinking Evaluate each power 02, 03, 04. Use your results to write a rule for the value of 0 raised to any nonzero whole number exponent.

How are the expressions 34 and 43different?

34 and 43 are different

Challenge The plastic tips on the ends of a shoelace are called aglets. Suppose a sneaker factory produces p pairs of shoes each hour and is in operation for h hours each day. Write a variable expression for the number of single aglets the factory uses each day. Evaluate the expression when p=200andh=20. Explain what your answer means.
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