How do i solve _+ _+ _ = 30 using 1,3,5,7,9,11,13,15 and 17?

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation,and the determine the cost if he drove it70 miles.b) what would be the cost of a car rental if the car was driven 250 miles? show work

Is (root2 -2)^2 rational or irrational. show the steps and answer fast