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VladimirAG [237]
2 years ago
12

2x-y-3z=7, 3x+y+=10, 5x+y+2z=15

Mathematics
2 answers:
rosijanka [135]2 years ago
7 0
Y 50 I think it is I am not to sure
BARSIC [14]2 years ago
5 0

Step-by-step explanation:

<h2>hope it helps you see the attachment </h2>

<h3>here I have used substitution method and also elimination method in one equation </h3>

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Someone help -2 • (- 4.5 ) =
Setler79 [48]

Answer:

9

Step-by-step explanation:

The product of two negative numbers is a positive number, and 2(4.5) = 9.

Thus, -2 • (- 4.5 ) = 9

6 0
3 years ago
A new car is purchased for 15500 dollars. The value of the car depreciates at 7.5% per year. What will the value of the car be,
mixer [17]

Answer:

\$9,709.17  

Step-by-step explanation:

we know that

The  formula to calculate the depreciated value  is equal to  

V=P(1-r)^{x}  

where  

V is the depreciated value  

P is the original value  

r is the rate of depreciation  in decimal  

x  is Number of Time Periods  

in this problem we have  

P=\$15,500\\r=7.5\%=0.075\\x=6\ years

substitute

V=\$15,500(1-0.075)^{6}=\$9,709.17  

4 0
2 years ago
It has been found that women are excluded from social events with coworkers. One study at Company X, found that women only recei
Natasha2012 [34]

Answer:

Option C is correct.

The p-value in this case is the probability of getting data like that observed or more extreme (i.e., getting an observed invitation rate of 33% or higher) assuming that;

The social strategies did not increase the rate of invitations for female colleagues.

Step-by-step explanation:

The p-value is actually defined as the probability of obtaining results as extreme as the observed results in the statistical analysis provided that the null hypothesis is true.

The standing condition for the p-value definition is the assumption that the null hypothesis is true, then it is the probability of getting the extreme result (usually not due to just random chance), that is usually observed, being tested for and contained in the alternative hypothesis.

Normally, in hypothesis testing, especially one comparing two sets of data, the null hypothesis plays the devil's advocate and usually takes the form of the opposite of the theory to be tested. It usually contains the signs =, ≤ and ≥ depending on the directions of the test. It usually maintains that, with random chance responsible for the outcome or results of any experimental study/hypothesis testing, its statement is true.

The alternative hypothesis usually confirms the theory being tested by the experimental setup. It usually contains the signs ≠, < and > depending on the directions of the test. It usually maintains that significant factors other than random chance, affect the outcome or results of the experimental study/hypothesis testing and result in its own statement.

Since this test aimed to test whether the rate of invitation of women to outside work events after using the social strategies, the null hypothesis for the question would be that there is no significant difference in the rate of invitation of the women after using the social strategies while the alternative hypothesis would be that the social strategies worked and the rate invitation of women to outside of work events increased.

So, the null hypothesis that we need to assume was true in the p-value definition is that; the social strategies did not increase the rate of invitations for female colleagues.

This is option C!

Hope this Helps!!!

8 0
2 years ago
What is the simple interest earned on<br> $300 over 6 years at 4% interest?
Alekssandra [29.7K]

Answer:

$72

Step-by-step explanation:

I = Prt

I = ($300)(0.04)(6)

I = $72

7 0
2 years ago
What are the values?
zavuch27 [327]

The average of a set of numbers

Step-by-step explanation:

An Example: 4×3 gives you the value of 12.

6 0
3 years ago
Read 2 more answers
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