I rlly need help. can someone pls explain this?

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

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

Which of the following expressions is equal to 2x^2+8