What slope passes through the points (2,7) and (-1,4) ?

A. -1
B. 1
C. 3

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

State one method by which you can recognize a perfect square trinomial.