Riley has $60 and her brother has $120. Riley saves $7 per week and her brother saves $5 per week. Which equation and solution represents the number of weeks, x, it will take for Riley and her brother to have the same amount of money

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.

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

Asinusoidal function whose frequency is 1/6pi