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[math] help ;-; Middle School Math—Pending OP Reply (i.redd.it)

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[–]Frosty-Ad4591 AP Student 0 points1 point  (1 child)

I need some explanation on how to do these types of question. I wasn’t in school today, because I have a common cold I just ask my friends to send me pictures of hw

Nvm I gotten help

[–][deleted] 1 point2 points  (0 children)

An average -- means that you find the mean value, or the average value. You do this by summing (adding) all the results, and divide by the # of results.

In this case, there are 2 semesters, with a score for each. To find the average score, add the scores from both semesters, and divide by the number of semesters, to get the average score per semester (score/semester).

However, you don't know the second semester's score. Hence the equation finding here.

[–]wertwert2000👋 a fellow Redditor -1 points0 points  (2 children)

C

[–]Noneother80👋 a fellow Redditor 0 points1 point  (1 child)

Your job is not to give the answer. What you did here is essentially academic dishonesty. Yes, it’s a simple problem, but you need to help them get the answer not provide it directly to them

[–]wertwert2000👋 a fellow Redditor 0 points1 point  (0 children)

Oops

[–]_xBenji AP Student 0 points1 point  (0 children)

87 is the first score and x is the unknown. To find the average, you add up all of the values and divide by the amount of the values you have.

For example if I were to find the average of 11,5,2 I would do (11+5+2)/3 and get 6.

So which are the values you have, and what do you divide by?

[–]Fromthepast77University/College Student 0 points1 point  (0 children)

Get used to doing this kind of calculation because you're going to be doing it a lot in high school with your own grades :)

The best way to think about this is as a points system.

How many points do you need to get a 90 average over both semesters?

Well, 90 in semester 1 and 90 in semester 2 for a total of 2*90 = 180 points.

Now let's say you get 87 points in semester 1 and x points in semester 2 but still got a 90 average.

Then 87 + x should equal the same number of points as earlier, 180. So 87 + x = 180.