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hodyreva [135]
3 years ago
6

Factor completely x2 - 49

Mathematics
2 answers:
Alex777 [14]3 years ago
7 0

Answer:

Answer: (x + 7)(x - 7)

Step-by-step explanation:

If a variable is taken to an even power, that variable is a perfect square. In this case, x² would therefore be a perfect square.

Since 49 is also a perfect square, what we have here is the difference of two squares. That can be factored as the product of two binomials one with a plus in the middle and one with a minus in the middle.

In the first position will be the factors of x² that are the same.

So we have x and x.

In the second position we will have the

factors of 49 that are the same, 7 and 7.

(x + 7)(x - 7) is your answer which is a factored version of x² - 49.

siniylev [52]3 years ago
5 0

Answer: (x + 7)(x - 7)

Explanation: If a variable is taken to an even power, that variable is a perfect square. In this case, x² would therefore be a perfect square.

Since 49 is also a perfect square, what we have here is the difference of two squares. That can be factored as the product of two binomials one with a plus in the middle and one with a minus in the middle.

In the first position will be the factors of x² that are the same.

So we have <em>x</em> and <em>x</em>.

In the second position we will have the

factors of 49 that are the same, 7 and 7.

(x + 7)(x - 7) is your answer which is a factored version of x² - 49.

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Find the mode of the following number of countries randomly selected travelers visited in the past two years. 13,13,15,7,8,4,4,7
Aliun [14]

Answer:

The mode of the following number of countries randomly selected travelers visited in the past two years is 13.

Step-by-step explanation:

The mode of a data-set is the value that appears the most commonly, the most frequently.

In this data-set:

13 appears 3 times

7 and 4 twice

The others once

So 13 is the mode.

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3 years ago
The lock on a safe requires a three-digit code to open it. The three digits must each be a number from 0-9 (10 possible numbers)
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10 x 9 x 8 = 720
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3 years ago
Solve 3/4x = 7 28/ 3​
Olegator [25]

3/4x=728/3

x=728/3×4/3

x=32.556

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6 0
3 years ago
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poizon [28]
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4 0
3 years ago
Question 3
BigorU [14]

Answer:

  30 mph

Step-by-step explanation:

time = distance/speed

If x represents Jane's speed along the summit then her total exploration time is ...

  12/x + 40/(x -5) = 2 . . . . . hours

Multiplying by (x)(x -5), we get ...

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Dividing by 2 and subtracting the left side gives ...

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Jane's speed along the summit was 30 mph.

3 0
3 years ago
Read 2 more answers
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