5/9 8th grade review

Find the value of x:

3x - 6 = 6x + 12

• x = -2

• x = -6

• x = 3

• x = 6

Simplify:

 $\left(6\ x\ 10^{11}\right)\left(9\ x\ 10^5\right)$  

•  $54\ x\ 10^{16}$  

•  $5.4\ x\ 10^{17}$  

•  $5.4\ x\ 10^6$  

•  $1.5\ x\ 10^{16}$  

Garrison earned $800 this summer cleaning boats. He spends $40 a week on food. Which equation represents Garrison's situation with only $400 left from his summer earnings?

• $800-400=\ 4x$

• $40x\ +\ 400\ =\ 800$

• $800\ -\ 40x\ =\ 400$

• $40x\ -\ 400\ =\ 800$

Find the missing length.

Round your answer to the nearest tenth.

• 13.1 units

• 8.4 units

• 4.2 units

• 8.5 units

Find the measure of

 $\angle y$  

•  $102\degree$  

•  $78\degree$  
  

•  $180\degree$  

•  $178\degree$  

The interior angles of a triangle add up to how many degrees?

• 90

• 180

• 270

• 360

What is the length of the hypotenuse?

• 100

• 28

• 14

• 10

What is slope-intercept form?

• Ax + By = C

• y - y₁ = m(x - x₁)

• y = mx + b

• y = x² + b

Find the slope:
(-3, 3) and (7, 6)

• 3/4
• -4/3
• 3/10
• -10/3

Between which two whole numbers is...

• 5 and 6

• 6 and 7

• 18 and 19

• 37 and 38