A) 7a+5b
B) a + 11b
C) 20a - 8b
D) 91a + 12b
solve: -6b+ 13a-2b+ 7a?
2009-12-14 2:18 pm
回答 (10)
2009-12-14 2:33 pm
✔ 最佳答案
-6b + 13a - 2b + 7a= 13a + 7a - 6b - 2b
= 20a - 8b
(answer C)
2009-12-14 2:25 pm
anser is c dont ask stupid Q on yahoo answers lear math dont waste time on the internet if you cant do simple math
2016-10-31 1:20 am
with the aid of rearranging and simplifying (3a + 2b) : (7a + 5b) = 13:31, b = (2 a):3 For the left hand part of (13a + 12b) : (17a + 15b), replace b = (2 a):3 13 a + 12 b = 13 a + 24 a/3 = 13 a + 8 a = 21 a For the final hand part, 17 a + 15 b = 17 a + 30a/3 = 17 a + 10 a = 27 a hence (13a + 12b) : (17a + 15b) = 21 a : 27 a
2009-12-14 2:56 pm
-6b + 13a - 2b + 7a
=> -8b + 20a or 20a - 8b
Hence the answer is:
C) 20a - 8b
=> -8b + 20a or 20a - 8b
Hence the answer is:
C) 20a - 8b
2009-12-14 2:55 pm
20a-8b c
2009-12-14 2:34 pm
-6b + 13a - 2b + 7a
You have to collect the like terms together. So you add the a's together and the b's together. You cannot add the a's and b's together.
-6b + -2b = -8b
13a + 7a = 20a
Do you see how to get this now?
The answer is C) 20a - 8b
Hope this helped you :) xx
You have to collect the like terms together. So you add the a's together and the b's together. You cannot add the a's and b's together.
-6b + -2b = -8b
13a + 7a = 20a
Do you see how to get this now?
The answer is C) 20a - 8b
Hope this helped you :) xx
2009-12-14 2:25 pm
-6B+13A-2B+7A can also be written as -6B-2B+13A+7A. We can then combine like-terms (the A's and B's) to get (-6-2)B+(13+7)A = -8B + 20A, which corresponds to answer C)
參考: basic algebra
2009-12-14 2:22 pm
Answer C.....just put common variables together
2009-12-14 2:23 pm
-6b - 2b = -8b
+13a + 7a = + 20a
Gives
20a - 8b.........This is answer C)
+13a + 7a = + 20a
Gives
20a - 8b.........This is answer C)
收錄日期: 2021-05-01 12:53:51
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