Evaluating Expressions

Evaluating Expressions

By Jennifer Wilson

​Evaluate = Find the number answer

You are given an expression and value for the variable:

​

​5x - 10 + 0.5x² + 35

when x = 4​

Subject | Subject

Some text here about the topic of discussion

Plug in the given value...

​5x - 10 + 0.5x² + 35

5(4) - 10 + 0.5(4)² +35​

Replace each variable with parentheses

and put the given number inside​

Subject | Subject

Some text here about the topic of discussion

​5(4) - 10 + 0.5(4)² +35

​

5(4) - 10 + 0.5​(16) + 35

​

20 - 10 + 8 + 35

​

10 + 8 + 35 = 53​

​53

​GEMS

Multiple Choice

Evaluate 4x when x = 5?

• 20
• 16
• 9
• 45

Multiple Choice

Evaluate this expression when x = 8. $$\frac{x-8}{4-x}$$  

• 0
• Undefined

• -4
• 8

Multiple Choice

Evaluate the expression below when x = -4

-7x² + 2x

• 104

• -64

• -120

• 120