Find the coordinate of the midpoint of the segment with the given endpoint
1. 3 and 5
2. -7 and 4
3. 5 and -9
4. -6 and -10

Carli has 90 apps on her phone. braylen has half the amount of apps as theiss. if carli has three timesthe amount of apps as theiss,how many apps does braylen have? let b represent the number of braylen's apps and t represent the number of theiss's apps.