8. 7.6 + (-7.1) = what does it equal plz help

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?

Alexandra drove from michigan to colorado to visit her friend. the speed limit on the highway is 70 miles per hour. if alexandra's combined driving time for the trip was 14 hours how many miles did alejandra drive?

Geometry triangles(ignore the handwriting)