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2 years ago

Is y = x^3 a function. Why or why not; please use complete sentences.

1 answer:

7 0

Yes it’s a function bc if u graph it no two points are on the same x or y point so it passes the vertical line test making it a function

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Please help me with this math question

olga nikolaevna [1]

Answer:

what are you trying to find?

3 0

3 years ago

How many equal line segments are needed to make a line of 30 triangles

nevsk [136]

It would be 90 triangles

6 0

3 years ago

Help he ooo. Who who memememeeme

Ksenya-84 [330]

Answer:are you trying to find the variable

Step-by-step explanation:

5 0

3 years ago

In a random sample of fivefive microwave ovens, the mean repair cost was $75.0075.00 and the standard deviation was $13.0013.

Radda [10]

<h2>Answer with explanation:</h2>

As per given , we have

Sample size : n= 5

Degree pf freedom = : df= 5-1=4

$\mu=\$75.00$

$\sigma=\$13.00$

Significance level for 90% confidence = $\alpha=1-0.90=0.1$

Using t-value table , t-critical value for 90% confidence:

$t_{\alpha/2, df}=t_{0.05, 4}=2.132.$

Margin of error of $\mu$ : $E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\(2.132)\dfrac{13}{\sqrt{5}}=12.3949720129\approx12.39$

Interpretation : The repair cost will be within $12.39 of the real population mean value $\mu$ 90% of the time.

7 0

3 years ago

Need help with this im confused

Jet001 [13]

Answer:

$-\frac34 -\frac14 i$

Step-by-step explanation:

Let's start with distributing: $\frac1{4i}-\frac{3i}{4i}$ Simplify i with i in the second term, and rearrange. $-\frac34 +\frac1{4i}$ . Since i in the denominator looks ugly, let's multiply top and bottom by i. $-\frac34 +\frac i{4i^2} = -\frac34 +\frac i{4(-1)} =-\frac34 -\frac14 i$ . The middle passage is based on the fact that, by definition, $i^2=-1$

6 0

3 years ago