Solve 7x – 5x – 3 = x + 4. a. x = 7 b. x = –10 c. x = 6 d. x = –

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

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.