If f(x) =x/2+8, what is f(x) when x=10

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

X+ y = 5 ; x - y =3 solve using linear combination