Write the quadratic equation in vertex form given the vertex (4,3) and through the point (1, 12)

I need a explanation on how to do this

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Use the following statements to write a compound statement for the conjunction or disjunction. then find its truth value. p: an isosceles triangle has two congruent sides. q: a right angle measures 90° r: four points are always coplanar. s: a decagon has 12 sides. a) a right angle measures 90° or an isosceles triangle has two congruent sides; true. b) a right angle measures 90° and an isosceles triangle has two congruent sides; true. c) a right angle measures 90° and an isosceles triangle does not have two congruent sides; false. d) a right angle measures 90° or an isosceles triangle does not have two congruent sides; true.