Two​ trains, Train A and Train​ B, weigh a total of 511 tons. Train A is heavier than Train B. The difference of their weights is 315 tons. What is the weight of each​ train?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

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).

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be