PLEASE HELP: Find the value of S20 for the series of 5+8+11+14+

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

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.