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fredd [130]
2 years ago
8

Write the expression 7x^3-28xy^2 as the product of 3 factors

Mathematics
2 answers:
Pani-rosa [81]2 years ago
5 0

Answer:

7·x^3 - 28·x·y^2

= 7·x·(x^2 - 4·y^2)

= 7·x·(x + 2·y)·(x - 2·y)


Leto [7]2 years ago
3 0

Answer:

7x(x - 2y)(x + 2y).

Step-by-step explanation:

First take out the GCF which is 7x:

7x^3-28xy^2

= 7x(x^2- 4y^2)

Now factor the expression in the brackets:

= 7x(x - 2y)(x + 2y)   (answer).

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2 years ago
The perimeter of a swimmingpool is 78 feet. The difference between four times the length and the width is 73.5 feet. What are th
Marianna [84]

Answer:

Length is 22.5 ft

Width is 16.5 ft

Step-by-step explanation:

4L-w=73.5

4L=73.5+w

L=(73.5+w)/4

P=78

P=2L+2w

78=2[(73.5+w)/4]+2w

78=(73.5+w)/2+2w

78=(73.5+w+4w)/2

2•78=73.5+5w

156=73.5+5w

156-73.5=5w

82.5=5w

82.5/5=w

16.5=w

L=(73.5+w)/4

=(73.5+16.5)/4

=90/4

L=22.5

3 0
3 years ago
Five times the difference of a number and two is 29
Slav-nsk [51]

5*(n-2) = 29

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5n/5 = 39/5 (further isolate)

n = 7.8 (answer)

Your number is 7.8.

3 0
3 years ago
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A sequence of numbers can be thought of as a function, where fin) represents the n term of the sequence. Which of the following
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Answer:

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2 years ago
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Maurinko [17]
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