Q55. - Algebra 1

Question

Solve each expression if $x=-2,y=6,\text{and }z=4$. (Lesson 2-5)

$\left|3-x\right|+7$

Step-by-Step Solution

Answer

The value of the expression is $12$

Step-1. Use the definition of absolute value function.

The absolute value or modulus of a real number x, denoted |x| is the non-negative value of x without regard to its sign.

Absolute value refers to a point's distance from zero or origin on the number line, regardless of the direction.

Step-2. Plug values and Simplify.

We are given the expressions:  $|3-x|+7$

Plugging the values $x=-2,y=6,\text{ and }z=4$ and simplifying as shown we get:

$\begin{array}{l}=\left|3-x\right|+7\\ =\left|3-\left(-2\right)\right|+7\\ =\left|3+2\right|+7\\ =\left|5\right|+7\\ =5+7\\ =12\end{array}$ 

Thus the value of the expression is $12$