If two triangles are created using the same 3 lengths for their corresponding segments will the triangles be congruent

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Multiply. −2x(6 x 4 −7 x 2 +x−5) express the answer in standard form. enter your answer in the box.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?