Two angles that lie in the same plane are called ? If the share a common side and common vertex

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

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.

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9