Ava's age is 5 years less than 4 times amy's age. if amy's age is x years, which expression best shows ava's age?
x
x − 1
4x − 5
5x − 4

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

Find the solution(s) to x^2-14+49=0

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.