? Plz help A regular hexagon and a line can intersect in?

What is r i 4.5+10r=-6.5 with work pls

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?