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Alexus [3.1K]
3 years ago
7

Factorize Зpq - 5р – 2p^2q​

Mathematics
1 answer:
NeTakaya3 years ago
6 0

Answer: p x (3q - 5 - 2pq)

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Robert mixes yellow and blue paint in the ratio of 3:2 .If he used 12 gallons of yellow paint, how many gallons of blue paint wo
GREYUIT [131]

Answer:

8 gallons

Step-by-step explanation:

3x4=12 (do the same to the opposite) 2x4=8 or 8 gallons of blue paint (to be more specific)

3 0
3 years ago
Please help.<br> Is algebra.
GalinKa [24]
The answer is d:(-2,4)
3 0
3 years ago
Find x. Round to the nearest tenth.
lions [1.4K]

Answer:

<u>x = 466.7 feet</u>

Step-by-step explanation:

Finding the top angle of the triangle :

  • They are complementary
  • 90° - 31°
  • 59°

Take the tan value of this angle to find y :

  • tan 59° = 400/y
  • 1.66427948 =400/y
  • y = 400 / 1.66427948
  • y = 240.344248

Using Pythagorean Theorem to find x :

  • y² + 400² = x²
  • x = √(240.344248)² + 160000
  • x = √57765.3575 + 160000
  • x = √217765.357
  • <u>x = 466.7 feet</u> (nearest tenth)
4 0
2 years ago
Read 2 more answers
Which of the following statements is true of the correlation analysis? The null hypothesis for the Pearson correlation coefficie
ASHA 777 [7]

Answer:

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}

And is distributed with n-2 degreed of freedom. df=n-2=10-2=8

For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:

The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:  

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

Solution to the problem

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}

And is distributed with n-2 degreed of freedom. df=n-2=10-2=8

For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:

The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero

4 0
3 years ago
How to solve this equation<br> :
Lady bird [3.3K]

Step-by-step explanation:

please mark me as branlist

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2 years ago
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