which expression represents a quadratic expression in complete factored form?
a.
(x − 1)(3x − 9)
b.
(x + 4)(x − 3)
c.
(2x + 4)(x + 3)
d.
(x − 2) + (x + 3)

Find the solution of this system of equation -7x+y=-20 9x-3y=36

What are the solutions to the following equation? |m| = 8.5 the value of m is equal to 8.5 and because each distance from zero is 8.5.

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e. g. 98.76543).