In a city with two news papers the Times and Herald , 300 people are asked which newspaper they buy each day. Of these people 50 people said they bought the Times , 110 people said they bought Herald and 160 said they did not buy a newspaper. Calculate how many bought a) both newspaper
b) either the Times or the Herald
c) the Times but not Herald
d) one newspaper only​

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.