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Alexeev081 [22]
3 years ago
13

Find the sum of the first 69 terms of the arithmetic sequence.

Mathematics
1 answer:
BartSMP [9]3 years ago
7 0

Answer:

66.4637681159

Step-by-step explanation:

add the 69 numbers and divide by 69 for how many terms there are

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Please help me with this question:)
tester [92]

Answer:

Ada is correct.

Step-by-step explanation:

Problems with Naman:

Naman is supposed to follow PEMDAS, which is the order of operations, and stands for:

Parenthesis

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Division

Addition

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~

The mistake: Naman moved +6 to the left and added it to the 2 located on the left side of the expression. You cannot do that, as it breaks the law of PEMDAS. On the other hand, Ada did the correct thing, which was to distribute 2 to all terms within the parenthesis (as one term in the parenthesis has a variable, and the other is a constant, meaning that they cannot be combined). This leads to Naman not doing the rest of the question correct.

Next, Ada correctly combined the two constants, which resulted in 0. 0 means nothing, therefore the placeholder is not needed. Therefore, 8x is the final answer.

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3 years ago
Which postulate proves that △ABC and △EDC are congruent?
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The correct answer is SAS.


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