Of two cards are drawn from a normal deck of 52 cards and not replaced, what is the probability that both cards will be clubs?

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

If chord ab is congruent to chord cd, then what must be true about ef and eg?

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle