math
posted by Sh .
y = 42cosx
what does the 4 mean since it is not part of the amplitude.
thanks in advance

4 is the mean value when you average over all values of x

suppose that a width of a rectangle is 5 inches shorter than the length and the the perimeter of the rectangle is 50
set up an equation for the perimeter invlving only l, the length of the rectangle
find the length and width 
It took Jose 3 hours to drive to Wayne's house at 16 kilometers per hour. How far is it between Jose's house and Wayne's house?