# Expressions, Equations, Functions, & Relations

26 Questions | Attempts: 1389
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• 1.
The expression "four less than a number" is the same as which of the following?
• A.

4-x

• B.

X-4

• 2.
Four times the sum of nine and a number
• A.

4(9 + n)

• B.

4 x 9 + n

• C.

4 + n + 9

• D.

4n + 9

• 3.
Three times Cassie's age increased by nine is twelve.
• A.

3x+12 - 9

• B.

3x + 9=12

• C.

3x + 12 = 9

• D.

3x + 5

• 4.
Brett got on an elevator and rode up 10 floors.  Next he rode down 7 floors.  After that he went up 4 floors.  Finally he went down 6 floors.  When he got off the elevator he was on the 11th floor.  What floor was he on when he started his ride?
• A.

8th floor

• B.

9th floor

• C.

10th floor

• D.

12th floor

• 5.
Sara and Kim together have  15 pencils.  Sara has 9  pencils. Mark and Kim together have 10 pencils.  How many pencils does Mark have?
• A.

5

• B.

34

• C.

8

• D.

4

• 6.
What is the algebraic expression for "a number f decreased by 18"?
• A.

18f

• B.

F + 18

• C.

F - 18

• D.

18 + f

• 7.
The coefficient of x when you have 1.55x is.....
• A.

1.00

• B.

0.55

• C.

1.55

• D.

155

• 8.
The coefficient of y when you have 22y/9 is.....
• A.

1/9

• B.

22/9

• C.

22

• 9.
A FUNCTION is a "special" type of ____________.
• 10.
The PURPOSE of a Function and Relation is to explain how something works and what is happening! It describes what is happening using NUMBERS (that don't change) and VARIABLES (that can change).
• A.

True

• B.

False

• 11.
Which (variable) do MATH BOOKS often use instead of "f(x)"? This (variable) and f(x) mean the same thing!!!Example: f(x) = x + 6  can also be written as (variable) = x + 6
• 12.
If you have the Function....Juggling (S) = 3 balls X _____  , where S =  # of secondsWhat variable should you put in the blank?!?
• 13.
Is this true or false?A FUNCTION is a SPECIAL TYPE of RELATION. A RELATION is not always a FUNCTION.
• A.

True

• B.

False

• 14.
Check ALL the answers that are TRUE!Why did your classmates do weight lifting and Mr.Morehead juggle balls in class?
• A.

So I could learn how to "describe a situation" using numbers and variables

• B.

To help me understand the Purpose of a Function is to explain how something works!

• C.

So I could decide what INPUT, OUTPUT, and VARIABLES to use so my Function is easy to understand

• D.

Because Mr.Morehead used to be in a juggling circus

• 15.
Steve had x dollars in his bank account and then he deposited \$10 each week for 3 weeks.  His total amount of money in the bank is now \$70.  What is x? ( How much money did he have to start?)
• A.

\$60

• B.

\$20

• C.

\$40

• 16.
What is the difference between an expression and an equation?Pick ONE answer
• A.

They are the same thing.

• B.

An equation has an equal sign, but an expression does not.

• C.

An equation has more numbers and an expression has more variables.

• 17.
What does 25k mean?
• A.

• B.

The difference between k and 25

• C.

The product of 25 and k

• 18.
The sum of three and twenty-two, divided by the number a
• A.

(3 + 22) / a

• B.

A / (3 + 22)

• C.

3 + 22 / a

• 19.
Fill in the blank with the correct word!A _________ is a letter that represents a number(of something).Hint: the answer has 8 letters
• 20.
Please fill in the answer below...The ____________ of a variable is the number in front of the variable.Hint: the answer has 11 letters
• 21.
Translate from an English expression into an Algebraic expression:a decreased by 17***answer with NO SPACES***  Example: x+5
• 22.
Translate from an English expression into an Algebraic expression:the ratio of m and n***answer with NO SPACES***  Example: x+5
• 23.
Translate from an English expression into an Algebraic expression:8 less than the sum of a and b***answer with NO SPACES***  Example: x+5***HINT...don't forget the ()
• 24.
Why is a Function so useful when you are trying to understand a situation?Pick only one of the following answers
• A.

A Function gives us an "EXACT" answer for every input!

• B.

A Function describes what is happening using "numbers" that don't change and "variables" for the things that can change.

• C.

Both of the above answers are CORRECT!!!!!!!!!!!!!!!!!!

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