Use synthetic division to determine whether the numbers are roots of the polynomials Could you please show how you solved I don’t understand how

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

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.

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates