A test consists of 20 problems and students are told to answer any 15 of these questions. In how many different ways can they choose the 15 questions?

15,504

20,145

23,670

25,890

Y is directly proportional to x, and y=10 when x=15. Write a direct proportion equation that relates x and y

A miners' cage of mass 420 kg contains 3 miners of total mass 280 kg. The cage is lowered from rest by a cable. For the first 10 seconds the cage accelerates uniformly and descends a distance of 75 m.

John and his friends are going out for pizza for lunch. They split one pizza and 3 drinks. The pizza cost $12.00. They spent a total of $16.95. Find the cost of one large drink.

Area & perimeter of L shapes

The ratio of the number of male lions to female lions in the animal reserve is 21:20. If there are 123 lions in the animal reserve, how many of the lions are female?

Michael lives in the northwest corner of Clark County. Clara lives 44 kilometers away in the southeast corner and the office where they work is directly between them.

We do is hiking along a trail that is 13.7 miles long. so far she has hide along 1/10 of the trail. how far has Rita hiked.

sharita does special typing jobs for scientist. she charges 16$ for the first 3 pages and 3$ for each additional page of scientific typing Sonia, a a biologist paid 106$ to have a research paper typed how many pages long was Sonia's paper

Find the difference. (-2ab-2a-5) - (6ab+2)

A sphere has a diameter of 14 ft. Which equation finds the volume of the sphere? V = four-thirds (7) cubed V = four-thirds pi (7) cubed V = four-thirds (14) cubed V = four-thirds pi (14) cubed