There is no solution to the equation cscx=-1 . True or False

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Prove that quadrilateral is a rhombus.

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)