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Eighth Grade (Grade 8) Math Questions

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Grade 8 :: Exponents by Sharon_Grabowski
Which one of the following is true?
  1. [math]4^-2 < 4^-3[/math]
  2. [math]5^-2 > 2 ^ -5[/math]
  3. [math](-2)^4 = 2^-4[/math]
  4. [math]5^2(5)^-2>2^5(2)^-5[/math]
Grade 8 :: Exponents by LBeth
[math]5^-3 = [/math]
  1. 25
  2. 125
  3. [math]1/25[/math]
  4. [math]1/125[/math]
Grade 8 :: Exponents by LBeth
[math]3^-3/3^-2 = [/math]
  1. [math]3[/math]
  2. [math]9[/math]
  3. [math]1/3[/math]
  4. [math]1/9[/math]
Grade 8 :: Exponents by LBeth
[math]3^2 xx 3^-5 = [/math]
  1. [math]3^3[/math]
  2. [math]3^-3[/math]
  3. [math]3^7[/math]
  4. [math]3^-7[/math]
Grade 8 :: Functions by LBeth
Fill in the table with the following values:

[math]{(-1, 2), (0, 3), (1, 4)}[/math]

Which algebraic equation gives the correct rule for the table?

Function Table - 3 Rows
  1. [math]y = 4x[/math]
  2. [math]y = 3x[/math]
  3. [math]y = x + 4[/math]
  4. [math]y = x + 3[/math]
Grade 8 :: Number Sentences by ramira6
Simplify the following:
2y + 9 + 8y + 7
  1. 26
  2. 10y+16
  3. 26y
  4. 10y + 9 + 7
Grade 8 :: Arithmetic and Number Concepts by ramira6
Please simplify the following:
a + a + a + 5
  1. a + a + a + 5
  2. 3a + 5
  3. 8a
  4. a3 + 5
Grade 8 :: Arithmetic and Number Concepts by ramira6
Distribute and simplify the following
3(x + 4) + 2(5 - x)
  1. 27x
  2. 5x + 12 + 15
  3. 0
  4. x + 22
Grade 8 :: Symmetry and Transformations by SheilaH
The point (8, 1) is reflected across the y-axis. What is its image?
  1. (1,8)
  2. (8,-1)
  3. (-8,1)
  4. (-8,-1)
Grade 8 :: Area by fannny
What is the formula to finding the circumference of a circle?
  1. c = pi x diameter
  2. c = pi x radius
  3. c = pi x 3.14
Grade 8 :: Perimeter by bettakenchu
Find the perimeter and the area of a rectangle that is 3 miles by 12 miles.
  1. [math]P = 30 mi, A = 36 mi^2[/math]
  2. [math]P = 12 mi, A = 72 mi^2[/math]
  3. [math]P = 18 mi, A = 36 mi^2[/math]
  4. [math]P = 15 mi, A = 72 mi^2[/math]
Grade 8 :: Perimeter by bettakenchu
Find the perimeter and the area of a square that is 1.7 ft on one side.
  1. [math]P = 6.8 ft, A = 2.89 ft^2[/math]
  2. [math]P = 3.4 ft, A = 5.78 ft^2[/math]
  3. [math]P = 16.8 ft, A = 5.78 ft^2[/math]
  4. [math]P = 5.78 ft, A = 2.89 ft^2[/math]
Grade 8 :: Exponents by LBeth
[math]10^2/10^-3 = [/math]
  1. 1,000
  2. 10,000
  3. 100,000
  4. 1,000,000
Grade 8 :: Exponents by LBeth
[math]4^3 xx 4^-4 = [/math]
  1. [math]4[/math]
  2. [math]1/4[/math]
  3. [math]1/4^7[/math]
  4. [math]1/4^12[/math]
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