Find the value of m. (5m+100)° (2m+10)° a.10 b.30 c.70 d.150

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?

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

The coordinates of one point of a line segment ate (-2,-7). the line segment is 12 units long. give three possible coordinates of the line segment’s other end point.