Find the measure of ∠d if

∠a =
5
2
x + 30
∠b =
7
2
x + 40
∠c =
9
2
x + 10
∠d =
5
2
x + 20

The hypotenuse of an isosceles right triangle is $14\sqrt 2$. what is the area of the triangle?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

15 points what is the end behavior of this graph? & what is the asymptote of this graph?