Will mark

solve for x.

use the completing the square method.

x² + 6x = 5

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Which value would be a solution for x in the inequality 47-4x< 7