Evaluating Variable

Evaluate Expression with Variables

By Elizabeth Thompson

When solving an expression...

Remember to follow Order of Operations

P- Parenthesis and Brackets

E- Exponents

M/D- Multiplication and Division

A/S- Addition and Subtraction

Remember when you have multiplication/division or addition/subtraction together you work left to right. ​

Multiple Choice

Evaluate the Expression

$$25-4^2\times2$$  

• -39

• 18

• -7

• 7

You can also solve expressions when given the value of a variable. Remember...​

Some text here about the topic of discussion

The constant is the number without a variable.

​

This equation has two terms​

The variable is the unknown numer.

The coefficient is the number with the variable​

4x+8

Multiple Choice

How many terms does the following equation have?

2+3x +4y

• 1

• 2

• 3

• 4

Multiple Choice

Which number is a coefficient?

2+3x +4y

• 1

• 2

• 3

• 5

When solving an expression with a variable- you will be given the value of the variable. ​

​

​

2+3x +4y ​

​

​x is 3, y is 5

What would I do first?​

Multiple Choice

The price of a visit to the dentist is calculated according to the formula 50+100n, where n is the number of cavities the dentist finds.

On your last visit to the dentist, 2 cavities were found.

What was the cost of your visit?

• 150

• 200

• 100

• 250

Multiple Choice

Eric owns and operates the Hot Ham food truck. The expression 3.25b+2h gives the cost of b burgers and h hot dogs.

What is the cost of 4 burgers and 6 hotdogs?

• $33.5

• $12

• $13

• $25

Multiple Choice

A rectangular prism with length L width W and height H has a volume of LWH.

What is the volume of a prism which has a base of 5m by 3m and a height of 4m?

• 60

• 15

• 12

• 19

Multiple Choice

Ben, Cam, and Justin are lumberjacks. The number of trees they chop down is given by b+2c+3j, where b is the number of hours Ben spends chopping, c is the number of hours Cam spends chopping, and j is the number of hours Justin spends chopping.

How many trees do they chop down after Ben spends 8 hours chopping, Cam spends 3 hours chopping, and Justin spends 4 hours chopping?

• 34

• 30

• 24

• 26

Multiple Choice

write the expression from words into numbers.

Six less than the product of four and a number x

• 4x-6

• 6-4x

Multiple Choice

write the expression from words into numbers.

The sum of ten and the quotient of a number x and 6.

• 10 + (x/6)

• x/6-10