Asif is saving for a toy that costs £16. he saves 80p a week. how many weeks does need to save.

Which point is on the line y=-2+3? (-2,-1) (3,3) (3,-3) (-3,-9)

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.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83