Grade 8 Open Up Resources Unit 4 Pre/Post Assessment

Which of these expressions is equivalent to 3(x - 2)?

• 3x - 6

• 3x - 2

• 3x + 2

• 3x + 6

Which of these expressions is equivalent to -2(x -5)?

• -2x -10

• -2x - 5

• -2x + 10

• -2x + 5

For the expression 4x + 3x, combine like terms and write an equivalent expression with fewer terms.

• 7x

• 12x

• 12x²

• 7x²

For the expression 3x + 5x - 1, combine like terms and write an equivalent expression with fewer terms.

• 15x² - 1

• 7x

• 8x + 1

• 8x - 1

For the expression 5 + 2x + 7 + 4x, combine like terms and write an equivalent expression with fewer terms.

• 18x

• 7x + 11x

• 6x + 12

• 8x + 35

For the expression 4 - 2x + 5x, combine like terms and write an equivalent expression with fewer terms.

• 7x

• 3x + 4

• 4 - 7x

• -10x² + 4

For the expression 10x - 5 + 3x - 2, combine like terms and write an equivalent expression with fewer terms.

• 5x + 1

• 6x

• 7x - 7

• 13x - 7

Find a value for  that makes the equation true.

 $x\div3=12$  

• x = 36

• x = 4

• x = 15

• x  = 9

Find a value for  that makes the equation true. $2x+3=20$  

•  $x=17$  

•  $x=42$  

•  $x=\frac{23}{2}=11\ \frac{1}{2}$  

•  $x=10$  

•  $x=\frac{17}{2}=8\frac{1}{2}$  

Find a value for  that makes the equation true.
 $\frac{4}{3}x=\frac{10}{3}$  

•  $x=10$  

•  $x=\frac{40}{9}$  

•  $x=\frac{10}{4}=\frac{5}{2}$  

•  $x=\frac{2}{5}$