The probability of picking a red marble from a bag is 38. If Sarah picks a marble from the bag 64 times (replacing the marble with each draw), how many times should she expect it to pick a red marble?

What is the square root of 45? (step by step working plz)

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

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?