Find h. c.f. and l. c.m. of x3-y3, x2-y2 and (x-y) ?

Charlie tosses five coins.what is the probability that all five coins will land tails up.

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

As a self-employed seamstress, you know that it takes 7 yards of material to make 3 jackets. you bought 15 yards of material to make 7 jackets. did you buy enough material? if not, how much were you over or under?