Write 25x^2-150x+9y^2=0 in standard form

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

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.

How many 2/5s are in 1 and 1/2 plz someone me right now