Which set of coordinates satisfies the equations x − 2y = -1 and 2x + 3y = 12? a. (1, 2) b. (3, 1) c. (3, 2) d. (-3, -2) e. (3, -2) reset next end of semester test: florida m/j pre-algebra a

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.