14. Tessa received $50 from her Grandma for her birthday. She decided to put this money
away and save an additional $12 per week
so she can buy a $398 tablet. How many
weeks will it take her to save?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Which expression is equivalent to 3^3 + 2^2?

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.