Jared is taking diving lessons and starts 2020 feet below sea level. he then dives down another 1010 feet. from there, he goes up 1515 feet. which equation shows jared's current level?

Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?

Select a graph that have an equation with a < 0

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?