Which expressions result in a negative number? choose all answers that are correct. a. –84 ÷ 21 b. c. –7.3 – (–4.3) d. –4.2 • (–3.5)

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

When the ball has traveled a distance of

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).