An inlet pipe can fill a tank in 10 h. An outlet pipe can drain that same tank in 30 h. The inlet valve is opened, but the outlet valve is accidentally left open. How long will it take to fill the tank with both valves open? (hint treat the drain
as a negative value and the pipe as a positive value)
(write your answer as a decimal of hours, do not include units)

Abaker makes 186 cookies. some are chocolate chip and some are oatmeal raisin, and both kinds are made with and without nuts, as shown in the table above. because they are more popular, the baker made 2/3 of the cookies chocolate chip. if a chocolate chip cookie is chosen at random, what is the probability that it will have nuts? a) 21/93 b) 21/62 c) 41/93 d) 21/41

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?