Answer quick please For 0 < x < pi/2, which expression is equivalent to sin(x/2)tan(x/2)/1-cos(x) ?

The figure above shows the lengths of thesides of a rectangle in cm. find the valuesof x and y and then the area of the rectangle.sides: top= 3x - yleft= 3y + 4bottom= 2x + yright= 2x - 3 use both methods, elimination and substitution, if possible.

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

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.