friday quiz math 8 sept 18

Simplify the expression: 2x + 1 + 7x 

• 10x
• 10
• 9x + 1
• 9 + 1x

Tags

CCSS.7.EE.A.1

n -10 +9n -3=

• -3
• 9n-3
• n
• 10n -13

Tags

CCSS.7.EE.A.1

-3 (a + 3)

• 3a - 9

• -3a + 9

• 3a + 9

• -3a - 9

Tags

CCSS.6.EE.A.3

-10 (-3x - 5y)

• 30x - 50y

• -30x - 50y

• 80xy

• 30x + 50y

Tags

CCSS.6.EE.A.3

Simplify the following expression:
-6x + 4(-x - 3)

• -2x - 12
• 10x + 12
• -10x - 12
• -2x + 12

Tags

CCSS.6.EE.A.3

Simplify the following expression:
-8 (5b + 2) -7 (b - 5)

• -33b + 19
• -47b² +  21
• 33b - 19
• -47b -19

Tags

CCSS.6.EE.A.3

In the equation
x + 7 = 12
7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation? 

• Subtract 7 from both sides. The solution is x = 5.
• Add 7 to both sides.
  The solution is x = 19.
• Multiply both sides by 7 The solution is x = 84.

Tags

CCSS.6.EE.B.7

r + 20 = 27

• r = 7
• r = 47
• r = 13
• r = 20

Tags

CCSS.6.EE.B.7

Solve the equation:
-5x = 25

• x = 20
• x = -20
• x = -5
• x = 5

Tags

CCSS.6.EE.B.7

The variable, k, is being divided by 11. How should you show your work to isolate the variable?

• Divide both sides by 11
• Multiply both sides by 11.
• Add 11 to both sides.
• Subtract 11 to both sides.

Tags

CCSS.6.EE.B.7