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3 years ago

I^4= -1 true or false?

Mathematics

2 answers:

nevsk [136]3 years ago

8 0

False because i^4=1, i^2 is -1

loris [4]3 years ago

5 0

Answer:

The answer is False i^4=-1

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Step-by-step explanation:

x is the number of years that go by

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3 years ago

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3 years ago

Math graph equation. (Picture.)

vladimir1956 [14]

Answer:

y = -2x + 3 is the required equation

Step-by-step explanation:

From the graph we will get two ordered pairs

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=-2

Slope = m = -2

Now the equation is

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taking (0,3) as a point

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3 years ago

Over the past several years, the proportion of one-person households has been increasing. The Census Bureau would like to test t

Ganezh [65]

Answer: z =2.39

Step-by-step explanation:

Given :

$H_0: p \leq0.23\\\\ H_a: p > 0.23$

A random sample of 136 households found that 43 consisted of one person.

i.e. Sample size : n= 136

Sample proportion : $\hat{p}=\dfrac{43}{136}=0.316176470588\approx0.3162$

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$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

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Hence, the value of the test statistic: z =2.39

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3 years ago

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anzhelika [568]

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3 years ago