Answers: 820,75,87,80
чоу
x + 2
answers : 132, 149, 150,
156
lp
if
qp=10
answers: 2.5, 5, 10, 1.67
m23
answers: - q
8, 6, 12

6(2x+y)+2(x+4y) how can i solve this

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.

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square