Answer:
(1).(C) Commutative property.
(4).(D) 3
(3).(D) 75
Step-by-step explanation:
(1) Commutative property of addition states that if two number p and q are real. Then, it doesn't matter in which order the numbers are added it will provide the same result. i.e.
p + q = q + p
Therefore, -8 + (-15) = (-15) + (-8) is an example of commutative property.
(2) - (q+14) = (-3) + (-14)
[tex]\Rightarrow -q - 14=-3 -14[/tex]
[tex]\Rightarrow-q= -17 +14[/tex]
[tex]\Rightarrow-q=-3[/tex]
[tex]\Rightarrow q=3[/tex]
(3) -10 + a + (-15) = 50
[tex]\Rightarrow a -25 = 50[/tex]
[tex]\Rightarrow a = 50 + 25 = 75[/tex]