There are 9 students in a class: 7 boys and 2 girls. if the teacher picks a group of 3. at random, what is the probability. that everyone in the group is a boy?

John wants to buy a DVD player. The price is $100, and the sales tax is 5 percent. Store A is offering a 10 percent discount and Store B is offering a $10 rebate.

How to explain 93 + (68+7)

If a meteor hits the Earth and forms a crater that measures 10 miles in diameter, what is the area of the crater formed?

What is the least common multiple of 24 27 and108

What is the definition of a term?

The height of a right triangle is 3 times the length of the base. If the area of the triangle is 54 cm^2 what is the height in centimeters

6*9/4 A street light is at the top of a 20 foot tall pole. A 6 foot tall woman walks away from the pole with a speed of 7 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 45 feet from the base of the pole?

Robert can run 1/2 of a mile in 1/15 of an hour. How many miles can Robert run in an Hour?

If the sales tax in our city is 4.9%, and an item costs $21 before tax, how much tax would you pay on that item?

The surface area of a rectangular prism is 42 cm2.