Please could someone help me understand this? thank you

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

What makes a trapezoid an isosceles trapezoid?

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