PLEASE HELP PLEASE

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

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).