If p is prime, then p2 + 4 is prime. counterexample

You ask your friend: "did you observe at least three heads?". your friend replies, "yes." what is the probability that coin 2 had been chosen?

A and B are centres of two circles of radii 8 cm and 1 cm such that AB = 13 cm and angle ACB = 90 degree where C is the centre of another circle which touches the above two circles. Find the area of the circle with centre C

What is the value of z in the equation 2 (4z - 6 - 6) = 170 - 46? 12.5 15.5 16.5 18.5

If you take away the two from the x first in 2 times x plus 3 equals 7 what does x equal

Solve the following system by substitution. X+2y=14 6x+3y=21

How many times does nine going to 29

39 ft./m is how many yards per second

Kevin went to see his favorite sport team play. His car can go 400 miles on one tank of gas. If he used 30% of a full tank of gas, how many miles did he travel?

There are 8 dinner rolls in a package. how many packages will be need to feed 64 people if each person has 2 dinner rolls?

You sent the same email message to 10 of your friends. The numbers of hours it took them to reply were 1, 1, 1, 2, 2, 3, 4, 5, 5, and 25. Find the mean, median, and mode of the data.