IT'S OK IF YOU DON'T ANSWER ALL OF THEM, JUST PLEASE HELP ME!!! I'M GIVING 100 POINTS!!!
4.
a + b + c = what when a = 8, b = 11, c = -13 ?
5.
Which of the following equations is equivalent to 28 – 6 = 22?
22 + 6 = 28
22 ∙ 6 = 28
28 + 22 = 6
22 – 6 = 28
6.
What is the multiplicative inverse of 8?
0.08
-1/8
1/8
-8
7.
If

, which of the following statements is true?
y · x = z
z - y = x
z - x = y