The perimeter of a rectangle is 80x. the base is 7 times the height. in terms of x, what are the dimensions of the rectangle? . a) h = 10x, b =10x . b) h = 5x, b = 35x . c) h = 3x, b = 5x . d) h = 5x, b = 25x

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.