Which is the simplified form of x-12?
O
*72
1
X12
1

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Solve the equation x/4 - 5= -8 -27 -12 -7 12

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.