The length of the longest side of a quadrilateral is 5 cm more than three times the cube of the length of the shortest side. The length of another si is 6 cm less than the square of the length of the shortest side. The length of a third side is 7 cmmore than four times the length of the shortest sic
What is the perimeter of the quadrilateral, in terms of s, the length ofthe shortest side?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

X+ y = 5 ; x - y =3 solve using linear combination

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.