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Step-5

Title: Determine the value of an expression

Grade: 8-a Lesson: S1-L8

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Determine the value of an expression when w = -4, x = 0, y = -3, z = -2 -2w -(- 2xyz)
2	Step	After simplification we get	-2w + 2xyz
3	Step	Now substitute w,x,y,z values in the expression	-2(-4) + 2(0)(-3)(-2)
4	Step	After multiplication we get	8 + 0
5	Step	After adding we get	8
6		Answer	D

Step

Type

Explanation

Answer

Problem

Determine the value of an expression when w = -4, x = 0, y = -3, z = -2
-2w -(- 2xyz)

Step

After simplification we get

-2w + 2xyz

Step

Now substitute w,x,y,z values in the expression

-2(-4) + 2(0)(-3)(-2)

Step

After multiplication we get

8 + 0

Step

After adding we get

Answer