You need to divide the miles by the hours to et the Average speed.
M divided by h = s
Because to get the mph (miles per hour) you multiply the average speed to the hours.
S•h=mph
Answer:
1.SAS, ASA,
2. Not congruent
3.C
4. If you could screenshot the whole page I can give tell you what it is.
Rearranging the first equation gives:

Substituting this into the other equation gives:

If x=-1:

So
x=-1, y=-5
Answer:
The answer to the question provided is letter D.