Please help Solve log7-2b-9=6

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

Equation for the calculation double 2 and then add 5