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Airida [17]
3 years ago
5

Plz help will mark brainless if right answer ;)

Mathematics
2 answers:
Pavel [41]3 years ago
7 0

Answer:

A

Step-by-step explanation:

Since each triangle is an equilateral triangle all side are the same length. Thus, one side is 15/3=5 inches. The perimeter of the entire figure would then be 3x6=18 since there are 6 sides.

uysha [10]3 years ago
4 0

Answer: i think b

Step-by-step explanation: if incorrect so so so sorry

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The sum of two numbers is 54 and the difference is 8. What are the numbers?
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Answer:

23 and 31 are the numbers you are searching for.

Step-by-step explanation:

23 + 31 = 54

31 - 23 = 8

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Step-by-step explanation:

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Emily is solving the following System of equations using Substitution:
Nesterboy [21]

Answer:

Emily is solving the following system of equations using substitution:

y = 3x - 4

y = 2x + 1

<u>Part</u><u> </u><u>A</u><u>:</u>

After substituting y's values:

3x - 4 = 2x + 1

<em><u>What she did:</u></em>

3x - 4 = 2x + 1

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<em><u>What she should have done:</u></em>

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x - 4 = 1

<u>Part</u><u> </u><u>B</u><u>:</u>

This rule has not been followed: Sign changes when numbers shift from left to right of ' = 'sign.

Emily did not changed the sign of the number, 2x from + 2x to - 2x when it was moved from the right side to the left.

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