3 pounds of trail mix and 8 pounds of jelly beans. the total cost is $23. theres 5 pounds of trail mix and 2 pounds of jelly beans. the total cost is $10. find the cost for each pound of trail mix and jelly beans

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

If a=0.333333 and b=0.55555, what is the value of a+b