A plane flying with the wind traveled 1260km in 2 hours. On the return trip, against the wind the trip took 3 hours. A) write a system of Equations to represent the situation. B) How long would the round trip be if the wind speed was doubled? Thanks to anyone who solves this, PLEASE show work

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters