If DE = 4 x + 10, EF = 2 x -1, and DF = 9 x - 15, what is the length of DF?

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

Which shows the pre image of triangle xyz

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.