Jack has a collection of new nickels and quarters. he has a total of 50 coins worth $10.30. how many of each coin does he have?

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

Rationalize the denominator- 12x/√x-10