Lucy has 48 small shells. She uses 2 shells to make one pair of earings. How many pairs of earings can she make?

24

Step-by-step explanation:

We know that Lucy has 48 shells, and each pair of earrings needs 2 shells. Now, we will have to divide 48 by 2 to get our answer.

Equation: 48 ÷ 2 = 24

Since we see that fourty-eight divided by two is twenty-four, your answer is twenty-four, but let's just double check.

Equation: 24 × 2 = 48

We also see our answer is fourty-eight, so our answer is 24, confirmed.

b. 24 mm

step-by-step explanation:

use the pythagorean theorem.

a^2 + b^2 = c^2

a^2 + 7^2 = 25^2

a^2 + 49 = 625

a^2 = 576

a = 24

answer: b. 24 mm