I need help with this

Solve the x in the equation x^2+14x+17=-96

Secant be and cf intersect at point d inside a what is the measure of cde

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.