Selena is 6 years younger than Paul. in 15 years, Paul will be 4 times the age that Selena is now. find their present ages

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

What is the ratio fraction form of 25: 9

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