Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):

4 + (5 + 3) ÷ 2 x 3 - 5²
P: 4 + (8) ÷ 2 x 3 - 5²
E: 4 + 8 ÷ 2 x 3 - 25
MD: 4 + \( \frac{8}{2} \) x 3 - 25
MD: 4 + \( \frac{24}{2} \) - 25
AS: \( \frac{8}{2} \) + \( \frac{24}{2} \) - 25
AS: \( \frac{32}{2} \) - 25
AS: \( \frac{32 - 50}{2} \)
\( \frac{-18}{2} \)
-9

The yearly interest charged on this loan is the annual interest rate multiplied by the amount borrowed:

interest = annual interest rate x loan amount

i = (\( \frac{6}{100} \)) x $400
i = 0.01 x $400

No payments were made so the total amount due is the original amount + the accumulated interest:

The area of a rectangle is width (w) x height (h). In this problem we know that the rectangle is twice as long as it is wide so h = 2w. The perimeter of a rectangle is 2w + 2h and we know that the perimeter of this rectangle is 24 meters so the equation becomes: 2w + 2h = 24.

Putting these two equations together and solving for width (w):

2w + 2h = 24
w + h = \( \frac{24}{2} \)
w + h = 12
w = 12 - h

From the question we know that h = 2w so substituting 2w for h gives us:

w = 12 - 2w
3w = 12
w = \( \frac{12}{3} \)
w = 4

Since h = 2w that makes h = (2 x 4) = 8 and the area = h x w = 4 x 8 = 32 m²

Average speed in miles per hour is the number of miles traveled divided by the number of hours:

Solving for distance:

distance = \( \text{speed} \times \text{time} \)
distance = \( 60mph \times 8h \)
480 miles

To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:

1z⁷ - 6z⁷
(1 - 6)z⁷
-5z⁷