Find the number and type of solutions for x^2-5x=-10

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual 

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.