A submarine and a cruise ship left Hawaii at the same time. The vessels traveled in opposite directions. The cruise ship traveled 3 km/h faster than the submarine. After nine hours they were 495 km apart. Find the submarine's speed.
The submarine's speed was
kph.

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Thanh and her crew are building a stage in the shape of a trapezoid for an upcoming festival. the lengths of the parallel sides of the trapezoid are 14 ft and 24 ft. the height of the trapezoid is 12 ft.what is the area of the stage? enter your answer in the box. ft²