Zoe paid \ $ 18.60$ 1 8 . 6 0dollar sign, 18, point, 60in sales tax and tip for your dinner. The tax rate iseleven\%1 1 %11th percent and she left twenty\%2 0 %20, percenttip. (Tax does not apply to tip, and tip is based on the price of dinner before tax) What was the price of Zoe's dinner before tax and tip?
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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?

Select a graph that have an equation with a < 0

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?