Theo started to solve the quadratic equation (x + 2)2 – 9 = –5. he added 9 to both sides and the resulting equation was
(x + 2)2 = 4. next, he took the square root of each side.

which was the resulting equation of that step?

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

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

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.