Find k so that the equation 9x^2 +12x+k =0 has one real number (double) root.

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Solve the system of equations y= 3/2 - 1, -x+ y =-3