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briannabo08
29.07.2019 •
Mathematics
1) yessenia simplified an expression as shown below: given: x + 6 + 3(x + 4) step 1: x + 9(x + 4) step 2: x + 9x + 36 step 3: 10x + 36 in which step did yessenia make a mistake? what should she have done instead? your answer cannot exceed 75 words.
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Ответ:
The mistake is done in step 1.
Correct answer is![x+6+3(x + 4)=4x+18](/tpl/images/0145/3564/9352f.png)
Step-by-step explanation:
Given : Yessenia simplified an expression![x + 6 + 3(x + 4)](/tpl/images/0145/3564/c07a5.png)
Step 1 -![x + 9(x + 4)](/tpl/images/0145/3564/f8464.png)
Step 2 -![x + 9x + 36](/tpl/images/0145/3564/91fcf.png)
Step 3 -![10x + 36](/tpl/images/0145/3564/7fea2.png)
To find : In which step did Yessenia make a mistake? What should she have done instead?
Solution :
The mistake is done in step 1.
As she cannot add 6 and 3 because 3 is in multiple with (x+4).
The correct steps are,
Given :![x + 6 + 3(x + 4)](/tpl/images/0145/3564/c07a5.png)
Step 1 - Multiply 3 under bracket,
Step 2 - Add like terms,
Therefore, The required result is![x+6+3(x + 4)=4x+18](/tpl/images/0145/3564/9352f.png)
Ответ:
x + 6 + 3(x + 4)
x + 6 + 3x + 12
and so on to find the right answer. hope this helps, God bless!
Ответ: