Associative property 8×30

I think you mean commutative property. 30 * 8

Step-by-step explanation:

This does not have parentheses around anything. To solve with commutative property switch the digits.

x ≈ 24.1

Step-by-step explanation:

This is a right triangle. So we use trigonometric functions.

tan  Θ = opposite / adjoint

tan 15 = x / 90

90 tan 15 = x

x = 24.11542

We round it to the nearest tenth.

x ≈ 24.1