Can someone me find 2 skews and 2 perpendicular lines

Find the equation of a line that is perpendicular to line g that contains (p, q). coordinate plane with line g that passes through the points negative 3 comma 6 and 0 comma 5 3x − y = 3p − q 3x + y = q − 3p x − y = p − q x + y = q − p

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi