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

5\( \sqrt{20} \) - 5\( \sqrt{5} \)
5\( \sqrt{4 \times 5} \) - 5\( \sqrt{5} \)
5\( \sqrt{2^2 \times 5} \) - 5\( \sqrt{5} \)
(5)(2)\( \sqrt{5} \) - 5\( \sqrt{5} \)
10\( \sqrt{5} \) - 5\( \sqrt{5} \)

Now that the radicands are identical, you can subtract them:

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 $300
i = 0.06 x $300

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

The first few multiples of 8 are [8, 16, 24, 32, 40, 48, 56, 64, 72, 80] and the first few multiples of 12 are [12, 24, 36, 48, 60, 72, 84, 96]. The first few multiples they share are [24, 48, 72, 96] making 24 the smallest multiple 8 and 12 have in common.

A number with an exponent (b^e) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b¹ = b) and a base with an exponent of 0 equals 1 ( (b⁰ = 1).

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

1c³ + 9c³
(1 + 9)c³
10c³