Which expression is equivalent to 4x – 7 – 4y + 18 – x – y? a. 4x – 4y + 11 b. 3x – 5y + 11 c. 5x – 3y + 11 d. –2xy + 11

Enter the missing numbers in the boxes to complete the table of equivalent ratios.time (min) distance (km)? 36 9? 1512 ?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

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.