Divide in simlest form 7/12 divided by 2/9

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

Akitchen is 12 ft. by 14 ft. with 10 ft. high walls. how much would it cost to put vinyl flooring in this room? $8.80 per ft