What is the correlation coefficient (r) of any any set of points that are colinear (fall on the same line) and have a positive slope between them?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Simplify the expression 10/11(22z) + (a+5) -1

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.