What is -3-(3-10) in mathmatical term

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.