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3 years ago

Is a "solution" another term for zeros?

Mathematics

2 answers:

kolezko [41]3 years ago

7 0

Answer:

Step-by-step explanation:

because its not a generally vector-valued function

HACTEHA [7]3 years ago

4 0

Answer:

Not necessarily

Step-by-step explanation:

A "solution" and a "zero" are the same thing for the equation ...

f(x) = 0

For anything else, such as ...

f(x) = 1

a zero of f(x) is <em>not a solution</em>.

_____

All equations can be put into the form

f(x) = 0

so a zero will be a solution to it. I often use this form with a graphing calculator, because those are adept at finding zeros.

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Write 49 as a product of primes.

tangare [24]

Answer:

7*7

Step-by-step explanation:

49 = 7*7

As 7 is a prime number ( a number that can only be written as a product of 1 and itself), we are finished

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3 years ago

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*Max is writing a novel. He has written 240 pages and

Rudiy27

Answer: He would have to write 17.14 pages per day in order to finish in one week.

Step-by-step explanation: 360-240=120, 120 divided By 7 is 17.1428571429 which roundes to 17.14.

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3 years ago

What should she do next to find 42 to the nearest hundredth?

ch4aika [34]

This answer would be b because

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3 years ago

IQ scores are measured with a test designed so that the mean is 116 and the standard deviation is 16. Consider the group of IQ s

butalik [34]

Answer:

So the z-scores that separate the unusual IQ scores from those that are usual are Z = -2 and Z = 2.

The IQ scores that separate the unusual IQ scores from those that are usual are 84 and 148.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 116, \sigma = 16$

What are the z scores that separate the unusual IQ scores from those that are usual?

If Z<-2 or Z > 2, the IQ score is unusual.

So the z-scores that separate the unusual IQ scores from those that are usual are Z = -2 and Z = 2.

What are the IQ scores that separate the unusual IQ scores from those that are usual?

Those IQ scores are X when Z = -2 and X when Z = 2. So

Z = -2

$Z = \frac{X - \mu}{\sigma}$

$-2 = \frac{X - 116}{16}$

$X - 116 = -2*16$

$X = 84$

Z = 2

$Z = \frac{X - \mu}{\sigma}$

$2 = \frac{X - 116}{16}$

$X - 116 = 2*16$

$X = 148$

The IQ scores that separate the unusual IQ scores from those that are usual are 84 and 148.

8 0

3 years ago

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Use the discriminant to determine the number of real solutions to x^2+7x-7=0

valkas [14]

Step-by-step explanation:

In general, you can skip the multiplication sign, so 5x is equivalent to 5⋅x.

In general, you can skip parentheses, but be very careful: e^3x is e3x, and e^(3x) is e3x.

Also, be careful when you write fractions: 1/x^2 ln(x) is 1x2ln(x), and 1/(x^2 ln(x)) is 1x2ln(x).

If you skip parentheses or a multiplication sign, type at least a whitespace, i.e. write sin x (or even better sin(x)) instead of sinx.

Sometimes I see expressions like tan^2xsec^3x: this will be parsed as tan2⋅3(xsec(x)). To get tan2(x)sec3(x), use parentheses: tan^2(x)sec^3(x).

Similarly, tanxsec^3x will be parsed as tan(xsec3(x)). To get tan(x)sec3(x), use parentheses: tan(x)sec^3(x).

From the table below, you can notice that sech is not supported, but you can still enter it using the identity sech(x)=1cosh(x).

If you get an error, double-check your expression, add parentheses and multiplication signs where needed, and consult the table below.

All suggestions and improvements are welcome. Please leave them in comments.

The following table contains the supported operations and functions:

5 0

3 years ago