The computer repairman is given 5 computers to test. he know that among them, there are 3 bad video cards and 4 failed hard drives. what is the probability that the first computer he tries has both problems?

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil