On Monday, the high temperature was 23 degrees F. The high temperature for each of the 4 days reflected changes of +4,-5, -3, and +2 degrees, with each change indicating the difference from the previous day's high
temperature. What was the high temperature, in degrees Farenheit, on Friday?
Show Your Work
37 degrees
25 degrees
23 degrees
21 degrees

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?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax