To add these fractions, first find the lowest common multiple of their denominators. The first few multiples of 9 are [9, 18, 27, 36, 45, 54, 63, 72, 81, 90] and the first few multiples of 15 are [15, 30, 45, 60, 75, 90]. The first few multiples they share are [45, 90] making 45 the smallest multiple 9 and 15 share.

Next, convert the fractions so each denominator equals the lowest common multiple:

\( \frac{5 x 5}{9 x 5} \) + \( \frac{9 x 3}{15 x 3} \)

\( \frac{25}{45} \) + \( \frac{27}{45} \)

Now, because the fractions share a common denominator, you can add them:

\( \frac{25 + 27}{45} \) = \( \frac{52}{45} \) = 1\(\frac{7}{45}\)

To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:

2a⁵ x 8a³
(2 x 8)a^{(5 + 3)}
16a⁸

By buying two shirts, Monty will save $37 x \( \frac{40}{100} \) = \( \frac{$37 x 40}{100} \) = \( \frac{$1480}{100} \) = $14.80 on the second shirt.

So, his total cost will be
$37.00 + ($37.00 - $14.80)
$37.00 + $22.20
$59.20

A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.

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 $1,400
i = 0.07 x $1,400
i = $98