Alyssa took a math test with 20 questions and she answered 16 questions correctly. In order get an a she need to get 90% of the questions correct

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

Using elimination, what is -4x+2y=-12 4x+8y=-24

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.