I don’t know the answer to this question. Please help, thanks.

If 50% of a number is 14 then 100% of the number is

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000