Can someone answer these questions?

What value of x will make the triangles similar by the sss similarity theorem?

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

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