Along-distance phone company has a monthly fee of $7.95 and charges a rate of $0.05 per minute. another long-distance company has a monthly fee of $9.95 and charges a rate of $0.03 per minute. at how many minutes would the two companies have equal charges?

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?

Pls me this is due today and i need i will make brainliest if you me answer correctly and i will report if you try to give me a dumb answer.

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?