The answer is A. 15x+33. Let's simplify step-by-step.<span><span>5<span>(<span><span>3x</span>+3</span>)</span></span>+18</span>Distribute:<span>=<span><span><span><span>(5)</span><span>(<span>3x</span>)</span></span>+<span><span>(5)</span><span>(3)</span></span></span>+18</span></span><span>=<span><span><span>15x</span>+15</span>+18</span></span>Combine Like Terms:<span>=<span><span><span>15x</span>+15</span>+18</span></span><span>=<span><span>(<span>15x</span>)</span>+<span>(<span>15+18</span>)</span></span></span><span>=<span><span>15x</span>+<span>33</span></span></span>