The distance between two cities is 400 miles. The function represents the average speed a person must travel over x hours to cover the distance. Which best compares the mathematical domain and range with the reasonable domain and range?mathematical: {x ∈ R} {y ∈ R}reasonable: x > 0, y ≥ 0mathematical: {x ∈ R ∣ x ≠ 0} {y ∈ R ∣ y ≠ 0}reasonable: x > 0, y > 0mathematical: {x ∈ R} {y ∈ R}reasonable: x ≥ 0, y ≥ 0mathematical: {x ∈ R ∣ x ≠ 0} {y ∈ R ∣ y ≠ 0}reasonable: x ≥ 0, y ≥ 0

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?

Is the figure congruent? yes or no?

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212