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deff fn [24]
3 years ago
12

Evaluate expression an the property used of (8-8)+21

Mathematics
1 answer:
Setler [38]3 years ago
6 0
The answer is 21 because you do PEMDAS first. (8-8) is 0. And 0+21 is 21
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Permutations!!
Advocard [28]

<span>Since the problem specifically stated that the people gather around the table, therefore we assume a circular table hence a circular formation of gathering.  Since the arrangement is important therefore we use the permutation.  </span>

nPr = n! / (n – r)!

<span>However before we proceed with our calculation we MUST first affix a reference point since the formation is circle. Imagine that the reference point is the 1st point made when you draw a circle, so it is the both the 0 degrees and the 360 degrees.</span>

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3 0
3 years ago
X=9y<br> 5x+3y= -48<br> What does x equal?<br> What does y equal?
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2 years ago
Explain the error in the work and how you might prevent it
Law Incorporation [45]

Answer:

The error is  -12x² - 14x = - 26x² because 12x² and 14x are unlike terms, so we can not add them

To prevent it the dividend must be written as 6x³ + 0x² - 14x + 1

Step-by-step explanation:

<em>In the division, you must arrange the dividend according to the greatest power of the variable, and put 0 as a coefficient of the missing term to avoid adding, unlike terms.</em>

<u>Example:</u>

If the dividend is 3x³ - 2x + 5, then you must write it as 3x³ + 0x² - 2x + 5

Let us solve our question

∵ The dividend is 6x³ + 1 - 14x

→ You must arrange it from the greatest power of x

∴ The dividend is 6x³ - 14x + 1

∵ The term of x² is missing

→ Write it in the dividend with a coefficient of 0

∴ The dividend is 6x³ + 0x² - 14x + 1

The error is the adding of unlike terms

∵ 6x³ - 14x + 1 ÷ 3x + 6 = 2x² and [6x³ - 14x + 1 - 6x³ - (6x³ + 12x²)]

∵ [6x³ - 14x + 1 - 6x³ - (6x³ + 12x²)] = 6x³ - 14x + 1 - 6x³ - 12x²

∵ 6x³ - 14x + 1 - 6x³ - 12x² = 0 - 12x² - 14x + 1

∵ 0 - 12x² - 14x + 1 = -26x² + 1 ⇒ error

∴ The error is  -12x² - 14x = - 26x² because 12x² and 14x are unlike terms,

   so we can not add them

→ To prevent it, write 0 as a coefficient of the missing term

∵ The missing term is the term of x²

∴ Add to the dividend the term 0x²

∴ The dividend must be written as 6x³ + 0x² - 14x + 1

4 0
2 years ago
Read 2 more answers
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