Answer:

Step-by-step explanation:
Midpoint Formula: 
Simply plug in your coordinates into the midpoint formula to find midpoint:
R(-2, 3)
S(-8, -2)



Answer:
B
Step-by-step explanation:

x-2=7
apply additon property of equality
x-2+2=7+2
x=9
Answer:


Step-by-step explanation:

Edit: Solve for Y
A straight line is 180 degrees so one side (the x side) is 160°, The Y side is 20, and you can work backwards by -

1900*4%
1900*0.04
76 (interest for a year)
76*3/4 (3/4 because 9 months is 3/4 of a year)
57 (9 months interest)
Margo will pay $57 in interest