Answer:
b
Step-by-step explanation:
hope this helps you! have a good day!
1)
b: 3.75 since it is half of the segment that measures 7.5, this is proven because the line in the middle is a bisector of the top and bottom line indication that both half measure the same; 3.75
2) 15 not sure why
Y=-2x+4 and y=-2x-5 (mark brainliest plss)