What is the value of x?​

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.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?

Fiona has to plot a histogram of the given data