Crew a can tunnel through a mountain in 30 days. if crew b starts from the other side at the same time, the tunnel can be completed in 18 days. how long would it take crew b working alone?

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

Determine the domain and range of the given function. the domain is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}. the range is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}.

Julie begins counting backwards from 1000 by 2’s and at the same time tony begins counting forward from 100 by 3’s.   if they count at the same rate, what number will they say at the same time?