Remove parentheses and simplify. Did I get these problems right?

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Anonymous
2016-05-31 02:40:27 Post No. 131449
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Anonymous 2016-05-31 02:40:27 Post No. 131449 [Report]

Remove parentheses and simplify.

Did I get these problems right?

8d - ( -7c -2d) my answer = 6d - 7c

7x - 3(x - 4) + x my answer = -3x -12

3 (5a - 2) + 10 (-2a + 1) answer = -5a + 4

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Anonymous 2016-05-31 02:44:06 Post No.131451
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Anonymous 2016-05-31 02:44:06 Post No.131451 [Report]

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lel everyting is wrong

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Anonymous 2016-05-31 02:44:55 Post No.131453
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Anonymous 2016-05-31 02:44:55 Post No.131453 [Report]

10d + 7c
4x + 12
-5a + 4

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Anonymous 2016-05-31 02:57:18 Post No.131457
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Anonymous 2016-05-31 02:57:18 Post No.131457 [Report]

>>131453
Not everything. That last one was right apparently.

Show me how to do it

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Anonymous 2016-05-31 03:20:46 Post No.131468
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Anonymous 2016-05-31 03:20:46 Post No.131468 [Report]

>>131453
How did u get 4x + 12?

Did you forget to add the lone x? I just redid the problem and got 5x + 12...

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Anonymous 2016-05-31 03:34:57 Post No.131477
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Anonymous 2016-05-31 03:34:57 Post No.131477 [Report]

Some more.

Find the value of each polynomial when x = 3

-3x squared + 7 my answer was -2

And the next is 5x squared + 4x - 20.

My answer was 217...

C'min gais. I've got an ex am this thursday. Don't let me down...