Answer:

Step-by-step explanation:
A − 3b = 16
a = b − 2
b - 2 - 3b = 16
2b = - 18
b = - 9
a = - 9 - 2
a = - 11
(-11,-9)
Answer:
0
Step-by-step explanation:
Slope is -7--7/1--4
=0/5
=0
Answer:
56°
Step-by-step explanation:
Y is the same as 124 because they are opposite angles
360 - (124×2) = 112°
÷ 2 = 56°