Monica is 400 miles away from home while her sister, mary is 300 miles away. say monica travels at a speed of 50 miles per hour and mary travels back at a speed of 40 miles per hour. solve the system of equation and graph it. when are the two sisters the same distance frome home

Ineed asap.i cant understand this question i need someone to me right away

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

Solve the equation by completing the square. x^2+2x=17