Answer:
1. Complimentary angles
2. 3x+20 = 10x-15: x = 5
3. I'm not sure on part 3, sorry.
Answer:
Step-by-step explanation:
-5.25+2.25 - 3
1-0.5 = 0.5
=-6 =m
y=-6x
Answer: 300
Step-by-step explanation: 300+200=500
then 500-200=300
Answer:
m = 5, n = 2
Step-by-step explanation:

Answer:
At point A
Step-by-step explanation:
As the x axis has -2 and y axis has 1
They are present in second quadrant
so (-1,2) is in point A