Answer:
I think it's C but I'm not too sure
The answer is D (last one)
Answer:
slope =
Step-by-step explanation:
1) Calculate the slope using slope formula,
. Use the two points given, substitute their x and y values into the formula, and solve.

Thus, the slope is
.
Answer:
23 and 4
Step-by-step explanation:
x-y=19
x+y=27
x=19+y
(19+y)+y=27
19+2y=27
2y=8
y=4
x-4=19
x=23
23+4=27
23-4=19