15. solve: 21-3y=36-6y
a) 19
b) 5
c) -5/3
d) -19

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

  cassidy wants to cut the yellow fabric into strips that are 0.3 yards wide. how many strips of yellow fabric can cassidy make? yellow fabric 16 yards for $108.00.

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.