A person sitting near a window in a passenger train timed that it took a freight train, traveling in opposite direction, 20 seconds to pass by him. What is the length of the freight train if the speed of the passenger train is 60 km/h and the speed of the freight train is 30 km/h.

Factor the following expression. 27y3 – 343 a. (3y + 7)(9y2 + 2ly + 49) b. (3y – 7)(9y2 + 2ly + 49) c. (3y – 7)(932 – 217 + 49) d. (3y + 7)(92 – 2ly + 49)

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6