Two trains begin their journey from the same station. The first train leaves at 12 noon and was traveling at 80 mph due south and the second train leaves the station an hour after heading east when a speed of 90 mph. How fast was the distance between the two trains changing at 8 PM? Use the derivative, (dy/dx), of a function, f(x) = y , is its instantaneous rate of change with respect to the variable x.

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

Which expression is equivalent to -5(3x - 6/7)

Efficient homemakers ltd. makes canvas wallets and leather wallets as part of a money-making project. for the canvas wallets, they need two yards of canvas and two yards of leather. for the leather wallets, they need four yards of leather and three yards of canvas. their production unit has purchased 44 yards of leather and 40 yards of canvas. let x be the number of leather wallets and y be the number of canvas wallets. draw the graph showing the feasible region to represent the number of the leather and canvas wallets that can be produced.