Algebra 1~

two employees at a banquet facility are given the task of folding napkins. one person starts folding napkins at a rate of 5 napkins per minute. the second person starts 10 minutes after the first person and folds napkins at a rate of 4 napkins per minute.
a. let y be the number of napkins folded x minutes after the first person starts folding. write a linear system that models the situation.

What number should be added to both sides of the equation to complete this square? x^2-10x=7

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

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.