In 4 years time I saw me three times as old as Mary who is now nine years of age how old am I

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis

Which shaded region is the solution to the system of inequalities? y y[tex]\geq[/tex]-x+1