If two sides of a triangle measure 123 inches and 150 inches, which of the following can NOT be the length of the third side of the triangle? answer choices:
275 inches
30 inches
75 inches
253 inches

I'm confused on this could anyone me and show me what i need to do to solve it.

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)