Which equation is perpendicular to y = 4x - 6 and passes through point (8, 12) ?

Me. i can't figure out this question. give an explanation too. .

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?