I need the answer for this one please

For the equations below which statement is true ? -2x=14 6x=-42

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?