Which algebraic expression is a polynomial? 3m2n – startfraction 2 m over n endfraction + startfraction 1 over n endfraction startfraction 2 m n over 5 endfraction – startfraction startroot m endroot over 4 endfraction + 4m5 startfraction 4 m cubed over n squared endfraction – 3mn5 + startroot 8 endroot 7mn + startfraction 3 m over 2 endfraction + startfraction 5 n over 4 endfraction

The table shows population statistics for the ages of best actor and best supporting actor winners at an awards ceremony. the distributions of the ages are approximately bell-shaped. compare the z-scores for the actors in the following situation. best actor best supporting actor muequals42.0 muequals49.0 sigmaequals7.3 sigmaequals15 in a particular year, the best actor was 59 years old and the best supporting actor was 45 years old. determine the z-scores for each. best actor: z equals best supporting actor: z equals (round to two decimal places as needed.) interpret the z-scores. the best actor was (more than 2 standard deviations above more than 1 standard deviation above less than 1 standard deviation above less than 2 standard deviations below) the mean, which (is not, is) unusual. the best supporting actor was (less than 1 standard deviation below more than 1 standard deviation above more than 2 standard deviations below more than 1 standard deviation below) the mean, which (is is not) unusual.

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76