There are 100 seats on a train 30% of the seats are empty how many empty seats are there on the train?

In the figure dhg fhe which statement is true by cpctc

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

I'll give brainliest if you answer right : )