Hector used the following clues to find an unknown 3 digit number. my tens digit is one less than my hundreds digit. my hundreds digit is 7. the sum of my ones digit and my tens digit is 8. what is the number?

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.

State one method by which you can recognize a perfect square trinomial.

Ofis to ? o y=-3x-4o y=-3x+(-4)o y=-4 + 3xoy=-4-3x