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Zolol [24]
2 years ago
7

Determine whether 81 − 49n4 is a difference of two squares. If so, factor it. If not, explain why.

Mathematics
1 answer:
Mumz [18]2 years ago
7 0

We have

81-49n^4=9^2-(7n^2)^2

so this is indeed a difference of squares. Factorizing would give

81-49n^4=(9-7n^2)(9+7n^2)

making the answer D.

We can further factor the first term here and write

9-7n^2=3^2-(\sqrt 7\,n)^2=(3-\sqrt7\,n)(3+\sqrt7\,n)

but that's clearly out of the scope of this question.

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How do i do this question
Anuta_ua [19.1K]

All the blocks are total 100 (10x10), so the answer will be 72 of 100 or 72/100

8 0
2 years ago
The steps to convert 18 over 8 to a decimal are shown below: Division is shown with divisor 8 and quotient 2.35 and dividend 18.
natka813 [3]

Answer:

Step 2

18 over 8 to a decimal is 2.25

Step-by-step explanation:

Step 1, 20, subtract 16 labeled as

Step 2, 40 labeled as

Step 3, subtract 40, and 0 labeled as Step 4.

Divisor = 8

Divided = 18

Quotient = 2.25

2.25

8 √18

- 16

2 0

- 16

4 0

- 40

0

The first error is at step 2

18 over 8 to a decimal is 2.25

See the attached image for better understanding

4 0
2 years ago
jennifer had 3/5 of a gallon of liquid shampoo and divided it evenly among 4 other bottles. How many gallons did she put into ea
kirill [66]
If the 3/5 was a whole number, it would all be simple. We would just put the number above 4 and divide. Easy, right?

Well, you do basically the same thing. Since having fractions over fractions confuse me, I'm going to put 3/5 into a decimal.
3/5=6/10=0.6

Now, I put that over 4, because there are 4 bottles.
0.6/4=6/40=3/20

She put 3/20 gallons into each bottle. Hope this helped!
6 0
3 years ago
Given a wavelength of 121,270 millimeters, what is the wavelength in kilometers?
Kipish [7]

Answer:Option A.

Step-by-step explanation:

I've attached the solution

5 0
3 years ago
Answers...........................?
Lemur [1.5K]
1.25/5 = 0.25

Your calculator can help with this if you don't happen to know already that 1/5 of 5/4 = 1/4.
7 0
2 years ago
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