Simplify. 1/4(1−2/3)2 last 2 is a exponent 1/3

Three coins are flipped. what is the probability that there will be at least two tails?

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4