Peter sent a motorized toy boat 21 ft downstream in 3 min. Jason sent the boat back upstream to Peter in 7 min. How fast did the boat travel in still water? How fast was the current moving?

Which is f(5) for the function –2x2 + 2x - 3?

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x