Im confused on this question khan academy

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18