A modern piano has 52 white keys and 36 black keys.

If a note is played at random, what is the probability of pressing a white key?

The sum of two number is 27. One number is 3more than the other number. Write and solve a system of equations to find the two numbers

There are 48 cards in a pack and each card is either red or black. The ratio of the number of red cards to the number of black cards is 1 : 1 8 red cards are removed from the pack.

What is 2.5x10^2? What is the exponent in 10^2?

8 / 15 divided by (-0.35) into a fraction

Devon is trying to find the unit price on a 6-pack of drinks on sale for $2.99. his sister says that at that price, each drink woykd cost just over $2.00.

I am a 2 digit even number. I am a multiple of 3 and 5. I have exactly 8 factors.

Which of the following statements are true? Select all that apply. a) The correlation coefficient gives us information as to how strong the linear associationis between two quantitative variables.

A linear equation is modified so that the rate of change is tripled, but the y-intercept remains the same. Which pair of equations could represent the original equation and the modified equation? A. y=x+3 and 3y=3x+9 B. y=9x-2 and y=12x-2 C.

Find the answer to - 5 + = - 1.

Write the equation of a line in slope intercept form with a y intercept at the origin and a slope of 2 y=x+2 y=2 y=2x 2y=x