I may need help? In confused on this because it’s not what I’ve learned before doing my work on computer?

Which ratio is equivalent to 10: 85

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)