In how many ways can the eight rooks be placed on an 8-by-8 chessboard so that no two rooks can attack one another?

How many different 1-topping pizzas can be formed by choosing a size and topping if your choices for size are small, medium, large, and extra-large while your choices for toppings are pepperoni, sausage, onions, ham, green peppers, mushrooms and

Convert 0.0000001 to the power of 10

If the circumference of a circle is 11 what's the area?

What is 16-12x in simplest form

What do you do before adding the equation so that one variable will be eliminated when you dd them 2x-4y=5 and 6x-3y=10

Mario has b books. After receiving 5 new books for his birthday, he had 18 books

Danny's 7 friends contributed an equal amount of money to buy him a birthday present. The present cost $84. How much money did each friend contribute?

How much will a saver earn in 10 years on a $100 deposit that earns 5% compound interest (compound annually) ?

Distributive property: Example: 6 (2x - 3) = 12x - 18 "Combine like terms" means 3x + 4x = 7x. But we cannot add 3x + 4. Simplify, don't solve for x, just simplify, write it with only one x and no parenthesis: 2 (4x - 1) + 3x =

What is a number greater than 40 whose prime factorization contains 3 prie numbers that do not repeat