At a middle school, 24% of the students buy lunch in the cafeteria. about what fraction of the students buy lunch

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?

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.