In a psychology class, 57 students have a mean score of 96.7 on a test. Then 12 more students take the test and their mean score is 75.7. What is the mean score of all of these students together? Round to one decimal place. mean of the scores of all the students =

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

Which expression is not a polynomial?

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