Tim can paint three 10 ft. by 12 ft. walls in 4 hours. he has to paint his house, and it has 9 walls this size that need to be painted. if he starts at 10: 00 a. m., about what time will tim finish?
a. 9: 00 p. m.
b. 9: 30 p. m.
c. 10: 00 p. m.
d. 10: 30 p. m.

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Find the vertex of the function given below y=x^2-6x+1

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?