The circumference of a circle is 12π feet.
What is the radius of the circle?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?