Cho số dcba chứng minh rằng N chia hết 16 khi và chỉ khi (a+2b+4c+8d) chia hết cho 16 với b chẵn

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.