In a pizza takeout restaurant, the following probability distribution was obtained. The random variable x represents the number of toppings for a large pizza. Find the mean and standard deviation.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Miranda is braiding her hair.then she will attach beads to the braid.she wants 1_3 of the beads to be red.if the greatest number of beads that will fit on the braid is 12,what other fractions could represent the part of the beads that are red?

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2