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Mustafa, Heloise, and Gia have written more than a combined total of 22 articles for the school newspaper.
Heloise has written as many articles as Mustafa has. Gia has written z as many articles as Mustafa has.
Write an inequality to determine the number of articles, m, Mustafa could have written for the school
newspaper

Solve 3x-18=2y and 5x-6y=6 by elimination show work

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.

This is about circle theorems. someone asap : (