Official online practice SAT

<p>So I did the full-length practice SAT on the CB website and have a few questions about the scoring.</p>

<ol>
<li><p>On the writing section, I didn't put anything for the essay and it's showing up as a zero for that section, and I got 46 MC right and 3 wrong (no omits). It's showing a 71 next to the letters MC on the report. And for the sake of convenience, is there a way to plug in a hypothetical essay score (like 8 or something) and mix it with my MC score to see what I would've gotten for the whole section if I actually did the essay?</p></li>
<li><p>On the section 6 (math) answer explanations, it doesn't have the bubble I filled in shaded in like the other sections. Does this mean my answers to this section didn't register?</p></li>
</ol>

<p>Whoops, I meant to say that the writing section had a 580, with a 0 next to the essay score. What I want to know is how to calculate what the final section score would be without the essay/with a hypothetical essay score plugged in.</p>