Which of the following is a number set that contains the number –5? A. integers B. whole numbers C. natural numbers D. irrational numbers

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

How many different triangles can be constructed with the angle measurements of 134° 10° and 36° ?

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3