Acar dealer value a car used as a trade in at $1. 120 the then offered it for sale for $ 1.400

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Which graph represents the equation y =4x

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.