Tell whether the statement is always, sometimes, or never true. Explain if x and y are right angles, then x and y are supplementary angles

What does x = in this equation x+3+2x=x+5

Which linear inequality is represented by the graph?

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