There are 52 white keys and 36 black keys on a standard piano. What is the probability that if a person did not look and hit the keyboard twice that he or she would first hit a white key and then hit a black key?

How to draw a obuse angle

A rectangle is 9 ft long and 40 in. wide. What is its perimeter in inches? (Note: 1 ft = 12 in.)

The height of the parallelogram, h, can be found by dividing the area by the length of the base. if the area of the parallelogram is represented by 4x2 - 2x 5 and the base is 2x - 6, which represents the height?2x 5 2x - 7 - 2x - 7 2x 5 -

Y^2 - 14y + 48 = 0 Solve the following quadratic equations by completing the square.

A sports company wants to package a ball with a 1.5-inch radus in sets of two. They have two options: a cylinder or a square prism

Minutes spent on homework 18,20,22,11,19,18,18 find the median and mode

Each week, Darin's Lawn Service mows 90 lawns in 45 hours at a housing complex. The lawns in the complex are the same size. At this rate, how many hours will it take Darin to mow 12 lawns?

What is the answer for x in x/5 = 7

Can the numbers 1 3 5 7 make two numbers whose product is 1767

Jamal is making pancakes. He has 6 3/4 cups of batter, but he needs a total of 12 cups. How much more batter does Jamal need?