The angles of a triangle are (x - 5), (x + 15)° and (2x + 10). Given that the sum of the
angles of a triangle is 180°, calculate the size
of each angle.​

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

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.