Factor the expression. 25x2 + 45x + 14

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

If value of cos330° is √3/2 then find tan165°.

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.