Can somebody help me with this. Will Mark brainliest. Need answer and explanation/work. Thanks.

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.

If the average of x,y and z is 15 what is their sum

Afile that is 274 megabytes is being downloaded. if the download is 12.8% complete, how many megabytes have been downloaded? round your answer to the nearest tenth.