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3 years ago

Plz answer correctly will give 30 points.

Mathematics

2 answers:

TEA [102]3 years ago

6 0

Answer:

Step-by-step explanation:

trust me.

xz_007 [3.2K]3 years ago

5 0

Answer:

Step-by-step explanation:

The base square itself is 4 x 4 which is 16, then there are 4 halfs which makes 2 more and the other 2 in that 2 triangles so 20

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Simplify for Y. 9y^3=-21-3x

Hitman42 [59]

Simplifying for y we get $y=-\sqrt[3]{\frac{(7+x)}{3}}$

Step-by-step explanation:

We need to solve for the value of y

$9y^3=-21-3x$

Taking -3 common on right side of equation

$9y^3=-3(7+x)$

Dividing both sides of equation by 9

$y^3=-\frac{3(7+x)}{9}$

$y^3=-\frac{(7+x)}{3}$

Taking cube root on both sides:

$\sqrt[3]{y}=-\sqrt[3]{\frac{(7+x)}{3}}\\ y=-\sqrt[3]{\frac{(7+x)}{3}}$

So, Simplifying for y we get $y=-\sqrt[3]{\frac{(7+x)}{3}}$

Keywords: Simplify the equations

Learn more about Simplify the equations at:

#learnwithBrainly

5 0

3 years ago

The temperature of a certain solution is estimated by taking a large number of independent measurements and averaging them. The

Mademuasel [1]

Answer:

(a) The 95% confidence interval for the temperature is (36.80°C, 37.20°C).

(b) The confidence level is 68%.

(d) The 95% confidence interval for the temperature if 10 measurements were made is (36.93°C, 37.07°C).

Step-by-step explanation:

Let X = temperature of a certain solution.

The estimated mean temperature is, $\bar x=37^{o}C$ .

The estimated standard deviation is, $s=0.1^{o}C$ .

(a)

The general form of a (1 - α)% confidence interval is:

$CI=SS\pm CV\times SD$

Here,

SS = sample statistic

CV = critical value

SD = standard deviation

It is provided that a large number of independent measurements are taken to estimate the mean and standard deviation.

Since the sample size is large use a z-confidence interval.

The critical value of z for 95% confidence interval is:

$z_{0.025}=1.96$

Compute the confidence interval as follows:

$CI=SS\pm CV\times SD\\=37\pm 1.96\times 0.1\\=37\pm0.196\\=(36.804, 37.196)\\\approx (36.80^{o}C, 37.20^{o}C)$

Thus, the 95% confidence interval for the temperature is (36.80°C, 37.20°C).

(b)

The confidence interval is, 37 ± 0.1°C.

Comparing the confidence interval with the general form:

$37\pm 0.1=SS\pm CV\times SD$

The critical value is,

CV = 1

Compute the value of P (-1 < Z < 1) as follows:

$P(-1$

The percentage of z-distribution between -1 and 1 is, 68%.

Thus, the confidence level is 68%.

(c)

The confidence interval for population mean can be constructed using either the z-interval or t-interval.

If the sample selected is small and the standard deviation is estimated from the sample, then a t-interval will be used to construct the confidence interval.

But this will be possible only if we assume that the population from which the sample is selected is Normally distributed.

Thus, the necessary assumption is that the population is normally distributed.

(d)

For n = 10 compute a 95% confidence interval for the temperature as follows:

The (1 - α)% t-confidence interval is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\times \frac{s}{\sqrt{n}}$

The critical value of t is:

$t_{\alpha/2, (n-1)}=t_{0.025, 9}=2.262$

*Use a t-table for the critical value.

The 95% confidence interval is:

$CI=37\pm 2.262\times \frac{0.1}{\sqrt{10}}\\=37\pm 0.072\\=(36.928, 37.072)\\\approx (36.93^{o}C, 37.07^{o}C)$

Thus, the 95% confidence interval for the temperature if 10 measurements were made is (36.93°C, 37.07°C).

3 0

3 years ago

Nisha closed the nozzle of the funnel and fills it completely with liquid. She then opens the nozzle. If the liquid drips at the

enyata [817]

Hi

The answer to this question is B 5.02

Hoped I Helped

3 0

3 years ago

Read 2 more answers

Use the given information to determine which of the following relationships can be proved and why?

JulsSmile [24]

Answer: A. Δ LMN ≅ ΔOPQ because of AAS.

Step-by-step explanation:

In the given picture, we have two triangles Δ LMN and ΔOPQ.

Also it is given that in Δ LMN and ΔOPQ.

$\angle{L}=\angle{O}$

$\angle{M}=\angle{P}$

$\overline{LN}=\overline{OQ}$

So by AAS theorem, we have

Δ LMN ≅ ΔOPQ.

AAS theorem says that if two angles and any side of a triangle are congruent to two angles and any side of another triangle then the two triangles are congruent.

4 0

4 years ago

Read 2 more answers

Which relation is a function

Natali [406]

Answer:

Look at image posted.

Step-by-step explanation:

The one I circle would be the answer because there should not be 2 points for every x-axis value. The 1st one has 2 points with x=0, the other 2 also have 2 points on the asme x axis value

7 0

3 years ago