Describe two methods for finding the total price of a bill that includes a 20 tip. Which method do you =
prefer?

X+y=-4 x-y=2 use elimination with adding and subtraction

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.

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.