The sum of a rational number and an irrational number is __ rational. always never sometimes

What is the ratio of the length of an object in yards to the length of the same object in miles?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10

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.