Key to Practice Midterm I

Problem 1

  1. True, by the distributive property.
  2. True, by the commutative property of multiplication.
  3. False, subtraction is not commutative.
  4. False, the left hand side contains fractions.

Problem 2

  1. -10x2 - 2x - 5
  2. -12q

Problem 3

The length of the deck should be 8 feet.

Problem 4

  1. The set of all whole numbers greater than four.
  2. {x c R | 6 < x < 10}

Problem 5

  1. -15
  2. 77/12
  3. 64/15

Problem 6

You are 4,230 feet above sea level.

Problem 7

  1. Contradiction
  2. x = -7/3
  3. Contradiction

Problem 8

  1. x + (3 + 2)
  2. 6x + 24
  3. y(2x)

 

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