Simplify (3x^2-x+7)+(6x^2-3)

9x^2-4x_7
9x^2-4x+4
-3x^2-x+4
9x^2-x+4

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.

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.

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me