find the equation of a straight line passing through the points (1,2) and the centroid of a triangle formed by the points (2,1) ,(-5,1) ,(-3,7)​

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible