Aclassroom has 12 students with brown hair, 8 students with black hair, and 5 students with blonde hair. if three students are chosen at random, what is the probability that they all have black hair?

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2