ZX and zy or supplementary angles. zy measures 49 degrees what is the measure of ZX

Which statement about the graph of y = 8(0.25)^2

In an improper fraction, is the numerator equal to, less than, or greater than the denominator

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.