What is the set builder form for [6,7,8,9, ]

Which expression is equivalent to -5(3x - 6/7)

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.

Manuela solved the equation below. what is the solution to manuela’s equation?