2 years ago

Which expression is equivalent to b^-3/ab^-3?

Mathematics

1 answer:

Mrrafil [7]2 years ago

7 0

1/a

The b^-3 in the denominator and numerator cancel out

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Area of 135 square meters and the length is 15 meters

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In a survey of students, 1162 stated they cheated and 2468 stated they did not. If one student is randomly selected what is the

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Answer:

$n = 1162 +2468 =3630$

And the probability that they cheated and we can use the classical definition of probability given by:

$p =\frac{successes}{Total}$

And replacing we got:

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Step-by-step explanation:

For this problem we know that in a survey of students, 1162 stated they cheated and 2468 stated they did not.

The total of people is given by:

$n = 1162 +2468 =3630$

And the probability that they cheated and we can use the classical definition of probability given by:

$p =\frac{successes}{Total}$

And replacing we got:

$p=\frac{1162}{3630}= 0.320$

So then the probability of people cheated is 0.320 or 32% approximately

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2 years ago

Show that (a-b)/(√a-√b)=√a+√b for all values of a and b such that a> 0 and b> 0 and a≠b.

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Answer:

Step-by-step explanation:

$\frac{a-b}{\sqrt{a} -\sqrt{b}} =\sqrt{a} +\sqrt{b}\\or ~a-b=(\sqrt{a} +\sqrt{b})(\sqrt{a} -\sqrt{b} )=(\sqrt{a} )^2-(\sqrt{b} )^2 =a-b$

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Hey!

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