4lw=v please help me with this :)

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Can someone me with the property questions for 12 13 and 14 plz

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