Use the reference angles to find the exact value of the expression cot -11 pi/6. do not use a calculator

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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.

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?