What is the measure of angle a in the triangle?

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

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.

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation