Greetings :)
To find slope of two points we will need to use this equation: 
( 6 , -12 ) ( 15 , -3 )
Now let's replace the equation with the numbers. (it will be a fraction).
= 
The equation equals 9 over 9, which also equals 1.
The slope of the line is 1.
Answer:
33 degrees
Step-by-step explanation
I used arcos, ∠A = arccos((a2 + b2 - c2)/2ab)
= 0.5795 rad = 33.203° = 33°12'11"
Its 25 for the second one
3 quarters (75cents) and 10 nickels (50cents) = 1.25$
Answer:
He was a bad judge of character (I think, been a while.)