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prohojiy [21]
3 years ago
7

Y^2 − x^2 = 100 is that a function or no?

Mathematics
2 answers:
Ugo [173]3 years ago
7 0

Answer:

No, it is not an equation

Step-by-step explanation:

See attached graph:

bearhunter [10]3 years ago
5 0

No. If you solve it for y, you have

y=\pm\sqrt{x^2+100}

So, given a certain value for x, say x=0, you have

y=\pm\sqrt{100}=\pm10

So, you're associating two y-values for each x value. This implies that this is not a function.

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Rosalyn is planning to sell her apartment complex. Ten years ago, she bought the eight-room complex for $420,000.
Alex777 [14]

Answer:

It would be $ 564,300 so C

Step-by-step explanation:

just took the test

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3 years ago
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Whoever gets it right is gets brainly also e x p la i n
QveST [7]

Answer:

D. D

Step-by-step explanation:

Where -1.9 is!!

The question states the : opposite of the opposite.

So- we find the opposite of (-1.9) =1.9 and the opposite of that is = -1.9.

So- it is situated at -1.9

Hope this helps!! =)

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3 years ago
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In a poll of 1000 adults in July​ 2010, 540 of those polled said that schools should ban sugary snacks and soft drinks. Complete
erastova [34]

Answer:

z=2.53  

p_v =P(z>2.53)=0.0057  

The p value obtained was a very low value and using the significance level given \alpha=0.05 we have p_v so then we have enough evidence to reject the null hypothesis, and we can say that at 5% of significance, the proportion of adults who support a ban on sugary snacks and soft​ drinks  is more than 0.5 or 50%.

Step-by-step explanation:

1) Data given and notation

n=1000 represent the random sample taken

X=540 represent the adults that said that schools should ban sugary snacks and soft drinks

\hat p=\frac{540}{1000}=0.54 estimated proportion of adults that said that schools should ban sugary snacks and soft drinks

p_o=0.5 is the value that we want to test

\alpha=0.05 represent the significance level

Confidence=95% or 0.95

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that majority of adults​ (more than​ 50%) support a ban on sugary snacks and soft​ drinks, the system of hypothesis are:  

Null hypothesis:p\leq 0.5  

Alternative hypothesis:p > 0.5  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

3) Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.54 -0.5}{\sqrt{\frac{0.5(1-0.5)}{1000}}}=2.53  

4) Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.05. The next step would be calculate the p value for this test.  

Since is a one side right tailed test the p value would be:  

p_v =P(z>2.53)=0.0057  

So the p value obtained was a very low value and using the significance level given \alpha=0.05 we have p_v so then we have enough evidence to reject the null hypothesis, and we can say that at 5% of significance, the proportion of adults who support a ban on sugary snacks and soft​ drinks  is more than 0.5 or 50%.

7 0
3 years ago
Can someone help me here ASAP? this question is worth 20 points. will mark the brainliest, thank you so much in advanced.
worty [1.4K]

Answer:

1. a) (1-1) (1-2) (1-3) (2-1) (2-2) (3-1)

2. a) (5-1) (5-2) (5-3) (5-4) (5-5) (5-6)

3. d) (1-3) (2-3) (3-1) (3-2) (3-4) (3-5) (3-6) (4-3) (5-3) (6-3)

Step-by-step explanation:

1. added the numbers in the parenthesis and A had all of the sums less than 5

2. A had all the 5s in the first spot

3. D had the  3s in each parenthesis

3 0
3 years ago
2x5x1742x2133+12/4= PlS hellllp
Fynjy0 [20]

Answer:

37,156,863

Step-by-step explanation:

2 x 5 x 1742 x 2133 + 12/4 =

10 x 1742 x 2133 +12/4 =

17420 x 2133 + 3=

37,156,860 + 3 =

37,156,863

8 0
3 years ago
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