The inequality properties allow us to multiply -1/2 to both sides, but we need to flip the operator to the greater-than sign (>).

y ⋅ -2 ⋅ -1/2 = y

and

-16 ⋅ -1/2 = 8

so

y > 8

Quiz (1 point)

• (-1) / 2 < 0
• (-2) ⋅ ((-1) / 2) = 1
• (-16) ⋅ ((-1) / 2) = 8

• if the following are true:

  • a < b
  • c < 0

  then a ⋅ c > b ⋅ c

• if b ⋅ c = d, then (a ⋅ b) ⋅ c = a ⋅ d

• if a = b ⋅ 1, then a = b

• if the following are true:

  • a > b
  • a = c
  • b = d

  then c > d

Please write your proof in the table below. Each row should contain one claim. The last claim is the statement that you are trying to prove.

Step	Claim	Reason (optional)	Error Message (if any)
1
2
3
4
5
6
7
8
9
10

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