To add these radicals together their radicands must be the same:

9\( \sqrt{75} \) + 5\( \sqrt{3} \)
9\( \sqrt{25 \times 3} \) + 5\( \sqrt{3} \)
9\( \sqrt{5^2 \times 3} \) + 5\( \sqrt{3} \)
(9)(5)\( \sqrt{3} \) + 5\( \sqrt{3} \)
45\( \sqrt{3} \) + 5\( \sqrt{3} \)

Now that the radicands are identical, you can add them together:

An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.

To multiply terms with radicals, multiply the coefficients and radicands separately:

3\( \sqrt{4} \) x 2\( \sqrt{3} \)
(3 x 2)\( \sqrt{4 \times 3} \)
6\( \sqrt{12} \)

Now we need to simplify the radical:

6\( \sqrt{12} \)
6\( \sqrt{3 \times 4} \)
6\( \sqrt{3 \times 2^2} \)
(6)(2)\( \sqrt{3} \)
12\( \sqrt{3} \)

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

3 + (5 + 4) ÷ 2 x 4 - 3²
P: 3 + (9) ÷ 2 x 4 - 3²
E: 3 + 9 ÷ 2 x 4 - 9
MD: 3 + \( \frac{9}{2} \) x 4 - 9
MD: 3 + \( \frac{36}{2} \) - 9
AS: \( \frac{6}{2} \) + \( \frac{36}{2} \) - 9
AS: \( \frac{42}{2} \) - 9
AS: \( \frac{42 - 18}{2} \)
\( \frac{24}{2} \)
12

By buying two shirts, Frank will save $14 x \( \frac{50}{100} \) = \( \frac{$14 x 50}{100} \) = \( \frac{$700}{100} \) = $7.00 on the second shirt.