In a factory there are three machines, a, b, and c. when all three machines are working, they produce 287 bolts per hour. when only machines a and c are working, they produce 197 bolts per hour. when only machines a and b are working, they produce 202 bolts per hour. how many bolts can machine b produce per hour?

How many lines can be drawn through points j and k? 0 1 2 3

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.