Review Test in Math 7 (4th Quarter)

Which of the following best describes an equation?

• A visual representation of numbers

• A type of bar model

• A statement that shows two expressions are equal

• A method to solve complex problems

A bar model represents 3x = 81. What is the value of x?

• 24

• 27

• 29

• 33

What is the solution to the equation 3 + y = 10 using a bar model?

• y = 7

• y = 10

• y = 3

• y = 13

Which of the following is a variable?

• π

• 0.2

• 3

• y

What is the numerical coefficient of -2x?

• -2

• -x

• x

• -2x

Which of the given is a trinomial?

• x + 5

• 5x2yz

• 3x2 + x + 7

• 2x2 + 2y - 3z - 10

Which of the following is NOT a polynomial?

• 2x1/2

• 5y

• 3x2

• -5

MJ wants to create an expression to represent the total number of students in a classroom where y represents the number of boys and 12 represents the number of girls. Which expression correctly models this situation?

• y + 12

• y - 12

• 12y

• 12/y

What do we call the process of finding the value of a given algebraic expression?

• Evaluation

• Substitution

• Solution

• Expression

If x = 3 and y = 5, then what is the value of 2xy - 7?

• 3

• 13

• 23

• 33