20. Find the perimeter of a rectangle with veticies A(-2, 6), B(-2,-1), C(3,6), and D(3,-1)

How do i i solve this equation? -18 = x/3 + 3

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9

F(x)=3(1.54)^x whats this how do you do it