Unit 2

What is the correct order of operations?

• Parentheses, Multiplication/Division, Addition/Subtraction, Exponents

• Parentheses, Multiplication/Division, Addition/Subtraction, Exponents

• Parentheses, Exponents, Multiplication/Division, Addition/Subtraction

• Exponents, Parentheses, Addition/Subtraction, Multiplication/Division

2x+3+5x-1

Which of the following expressions is equivalent?

• 10x-3

• 7x+4

• 7x-2

• 7x+2

Simplify the expression using the order of operations

5² (10÷2) x 4

• 80

• 5

• -10

• 20

If x=6 and y=2, what is the value of 1/4(x² - y²)

• 7

• 8

• 14

• 112

If x= ^- 8 and y= 10,what is the value of ^- 2 ∣x+3∣ + y?

• 20

• -12

• 5

• 0

Which of the following words tell us we need to switch the order of our numbers and variables when we translate expressions? Select all that apply.

• Product

• More than

• Taken from

• Sum

• Quotient

What equation is modeled above?

• - 3x + 6= -4

• 3x - 6=4

• -6x + 3 =4

• 6x - 3 = -4

Which of the following are the correct steps for solving the equation?

 $\frac{\left(3+x\right)}{5}=1$  

• Multiply both sides by -5, then add 3 to both sides

• Subtract 3 from both sides, then multiply both sides by -5

• Divide both sides by -5, then subtract 3 from both sides

• Multiply both sides by 5, then subtract 3 from both sides

Find the solution to this equation
 $7+\frac{a}{3}=5$   

• 3

• 15

• -6

• -2

Choose the equation that represents the following situation.

You bought a $5 magazine and four erasers. If you spent a total of $25, how much did each eraser cost?

• 5+x=25

• 5+4x=25

• 5x=25

• 25-5x=4