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2 years ago

What fraction is equal to 3/5? 12/20 16/25 20/30 26/40

Mathematics

1 answer:

Debora [2.8K]2 years ago

6 0

12/20 is equivalent to 3/5. <span />

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Solve the following for equation a. <br> 8 = a/b

ruslelena [56]

Answer:

a=8b

Step-by-step explanation:

To do this we just need to isolate a

so we can multiply the equation by b

then we will get

a=8b

3 0

2 years ago

THE ORIGINAL CARS Movie MADe 450

Marina86 [1]

Answer:

34% decrease

Step-by-step explanation:

(V1-V2)/V1x100

450-297=153

153/450=0.34

0.34 x 100=34

34% decrease

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3 0

3 years ago

Calculating the degrees of freedom, the sample variance, and the estimated standard error for evaluations using the t statistic

Yuliya22 [10]

Answer:

a) For the first part we have a sample of n =10 and we want to find the degrees of freedom, and we can use the following formula:

$df = n-1= 10-1=9$

d.9

b) $s^2 = \frac{SS}{n-1}= \frac{600}{41-1}= 15$

a.15

c) For this case we have the sample size n = 25 and the sample variance is $s^2 =400$ , the standard error can founded with this formula:

$SE = \frac{s^2}{\sqrt{n}}= \frac{400}{\sqrt{25}}= 80$

Step-by-step explanation:

Part a

For the first part we have a sample of n =10 and we want to find the degrees of freedom, and we can use the following formula:

$df = n-1= 10-1=9$

d.9

Part b

From a sample we know that n=41 and SS= 600, where SS represent the sum of quares given by:

$SS = \sum_{i=1}^n (X_i -\bar X)^2$

And the sample variance for this case can be calculated from this formula:

$s^2 = \frac{SS}{n-1}= \frac{600}{41-1}= 15$

a.15

Part c

For this case we have the sample size n = 25 and the sample variance is $s^2 =400$ , the standard error can founded with this formula:

$SE = \frac{s^2}{\sqrt{n}}= \frac{400}{\sqrt{25}}= 80$

8 0

2 years ago

2x^3+3x^2-30x+7/x-3 divide

slava [35]

<span>2x^3+3x^2-30x+7/x-3 divide</span>

4 0

2 years ago

Woul I use open or close intervals for x - 1 < 5

JulijaS [17]

Hi there!

You would use open intervals.

In the given inequality, the "<" sign is used, which means "greater than".

Open intervals would be used unless the inequality uses "≤" or "≥", which

mean "equal to or greater/less than". Closed brackets would be used in this

instance.

4 0

3 years ago