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Helen [10]
3 years ago
12

Can someone help answer this please

Mathematics
1 answer:
Pani-rosa [81]3 years ago
4 0
B; C is wrong as it cannot be expressed by the speedometer, leaving A, B, and D. B is correct as is suggests accuracy to the best possibility. 

Merry Christmas! Hope I helped!
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Determine whether 81 − 49n4 is a difference of two squares. If so, factor it. If not, explain why.
Mumz [18]

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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Switch sides.

2.3h = W + 88

Divide both sides by 2.3.

h = (W + 88)/2.3
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4 years ago
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