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3 years ago

How do we express 4 less than the square of a number?

Mathematics

2 answers:

Alex73 [517]3 years ago

7 0

Let us say we have a number x.

Square of the number x is x².

4 less means we subtract 4 from the above found expression.

So final expression becomes:

$x^{2} -4$

Svetllana [295]3 years ago

3 0

$x^{2} - 4$

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a_sh-v [17]

The term without a variable is the constant, so the answer is 6

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3 years ago

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Step-by-step explanation:

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2 years ago

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IgorLugansk [536]

Answer:

f(-x)= -f(x) so, the given function $f(x)= x^3-2x$ is Odd

Step-by-step explanation:

We need to determine if the function $f(x)= x^3-2x$ is Even, Odd, or Neither.

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So, Putting x =-x and determining if the given function $f(x)= x^3-2x$ is Even, Odd, or Neither.

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2 years ago

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Harlamova29_29 [7]

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Step-by-step explanation:

Not 100% sure this is what you needed but this is my try.

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2 years ago

One survey showed that among 785 randomly selected subjects who completed four years of college, 18.3% smoke and a 98% confidenc

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Answer

a. True

Step-by-step explanation:

Based on this survey we estimate that about $18.3\%$ of the college students smokes. And a $98\%$ confidence interval is $[15.1\% ; 21.6\%]$ . So we know that our estimative for the smoking rate is in the confidence interval with $98\%$ certainty. We also know the estimative for the smoking rate in the general population is $27\%$ . So we can write the two possible hypothesis:

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$H_1 =$ Smoking rate is not equal to $27\%$ .

We will reject the null hypothesis $(H_0)$ if the estimate doesn't fall into the confidence interval for the college students smoking rate.

Since this condition holds we reject the null hypothesis. So with $98\%$ certainty we say that the smoking rate for the general population is different than the smoking rate for the college students.

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2 years ago