What is 1,430,000,000 in scientific notation?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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.

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false