Karin is also in mr. whittaker’s science class, and she recorded the variation in water level at a different part of the river. karin observed that the water level there fell 1.68 millimeters per year for 1.5 years. which expression shows a way to use the distributive property to solve for the total variation in water level at this part of the river? 1.5(-1) + 0.68 1 + (0.)(0.68) (-1.68)(1) + (-1.68)(0.5) 1(-1) + 0.5(-0.68)

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?

Atriangle has side lengths of 15 inches and 30 inches. it also has angles that measure 45º and 20º. which of the following identifies the possible third angle of the triangle? a. 15 in., 65º b. 45 in., 65º c. 17 in., 115º d. 14 in., 115º

Find x & pleeeeaaaassseeee me !