Robert and janet want to have a bike race. they start at the same point. robert rides at an average speed of 15 mph, and janet rides at an average speed of 17.5 mph. after how many hours will janet have a 2-mile advantage? 0.50 hrs 1.00 hrs 0.80 hrs 1.25 hrs

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?

He trapezoid is composed of a rectangle and two triangles. what is the area of the rectangle? what is the total area of the triangles? what is the area of the trapezoid? ? a) 42 cm2; 27 cm2; 69 cm 2 b) 54 cm2; 27 cm2; 81 cm 2 c) 108 cm2; 27 cm2; 135 cm 2 d) 108 cm2; 13.5 cm2; 121.5 cm 2