You withdraw $40 each month from your savings account. Write an expression and evaluate that represents the change in your balance after 4 months.

I'm not sure I understand the question thoroughly but I'll try...

Let's make "x" the amount in the account.

$40 * 4 = $160.

After four months: x - $160

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2