The national interest rate for savings accounts is 0.04%. I put $2,000 in my savings account for 40 years. How much interest will I earn?

$32.25

Step-by-step explanation:

Assuming this is compound interest, the value of the investment after a period of time can be calculated with the future value formula:

Value = Investment * ( 1 + rate) ^ no. of periods

Value ₄₀ = 2,000 * ( 1 + 0.04%)⁴⁰

Value ₄₀ = $2,032.25

Interest earned = Value at 40 years - Initial investment

= 2,032.25 - 2,000

= $32.25

x = -2

y = 2

Step-by-step explanation:

3x  - 4y = -14 (I)

3x + 2y = -2 (II)

Multiply equation (II) by (-1) and then add. Now, x will be eliminated and you can find the value of y

(I)*(-1)           -3x + 4y = 14

(II)               3x + 2y =  -2        {Now, add}

                         6y = 12

                          y = 12/6

                        y = 2

Plugin y = 2 in equation (I)

3x - 4*2 = -14    {Add 8 to both sides}

3x - 8 = -14

    3x  = - 14 + 8    

    3x =  -6         {Divide both sides by 3}

      x = -6/3

       x = -2