Expressions and Their Solutions

Determine whether the given value is a solution.
b + 21 = 28, if b = 8

• yes

• no

What is a mathematical phrase that contains operations, numbers, and/or variables?

• expression

• equation

• solve 

• order

What is the rule for evaluating expressions that says: first perform the operations in parantheses, then compute powers and roots, then perform all multiplication and division from left to right, and then perform all addition and subtraction left to right?

• integer

• order of operations

• graph of an equation

• absolute value

Expressions that are equal not matter what value we use for the variable

• Equivalent Systems

• Equivalent Equations

• Equivalent Expressions

• System of Equations

What is the value of the expression below?
15 + 10 ÷ 2 + 3(-2 + 6)

• 20

• 24.5

• 32

• 37

What is the value of 2x² - 4y when x = 3 and y = 5?

• -27

• -2

• 9

• 38

What is the value of the expression when x = -2 and y = 4?

• -9

• -3

• -2

• 12

Which of the following expressions is 5(x − 3) +12 in simplest form?

• 5x - 27

• 5x - 3

• 5x + 9

• 5x - 3 + 12

Which of the following expressions represents the perimeter of the figure above?

• 4(x + 4 + 1)

• 2(x + 4) - 2(x + 1)

• 2x + 5

• 4x + 10

Which of the following equations have a solution of y = −22? Select all that apply.

• 2y − 11 = −2

• y/2 + 8 = -3

• -22 = y + 1

• -68 = 3y - 2

• -2x + 9 = -11