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Licemer1 [7]
3 years ago
6

What is the value of y

Mathematics
1 answer:
mrs_skeptik [129]3 years ago
4 0
Well y is a varible so dependimg on the equation y can equal many numbers
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What number is least likely to be represented by -4.5.
elena55 [62]
My answer is should: increase of 4.5

......................
P.S..If you have options then it's better................



8 0
3 years ago
Someone please help me this is the last question on my homework. I have to write a quadratic equation for this word problem...
antiseptic1488 [7]

Answer:

57xsqaure-42x=5.5

Step-by-step explanation:

5 0
3 years ago
Each side of a square office is 8 yards long. It will cost $65.00 per square yard to replace the carpet in the office. What woul
Sati [7]

Answer:

520 because 65 x 8 is 520

Step-by-step explanation:

7 0
3 years ago
Two different types of polishing solutions are being evaluated for possible use in a tumble-polish operation for manufacturing i
Nina [5.8K]

Answer:

z=\frac{0.843-0.653}{\sqrt{0.748(1-0.748)(\frac{1}{300}+\frac{1}{300})}}=5.358    

p_v =2*P(Z>5.358) = 4.2x10^{-8}  

Comparing the p value with the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can say that we have singificantly differences between the two proportions.  

Step-by-step explanation:

Data given and notation  

X_{1}=253 represent the number with no defects in sample 1

X_{2}=196 represent the number with no defects in sample 1

n_{1}=300 sample 1

n_{2}=300 sample 2

p_{1}=\frac{253}{300}=0.843 represent the proportion of number with no defects in sample 1

p_{2}=\frac{196}{300}=0.653 represent the proportion of number with no defects in sample 2

z would represent the statistic (variable of interest)  

p_v represent the value for the test (variable of interest)  

\alpha=0.05 significance level given

Concepts and formulas to use  

We need to conduct a hypothesis in order to check if is there is a difference in the the two proportions, the system of hypothesis would be:  

Null hypothesis:p_{1} - p_2}=0  

Alternative hypothesis:p_{1} - p_{2} \neq 0  

We need to apply a z test to compare proportions, and the statistic is given by:  

z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)  

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{253+196}{300+300}=0.748  

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.  

Calculate the statistic  

Replacing in formula (1) the values obtained we got this:  

z=\frac{0.843-0.653}{\sqrt{0.748(1-0.748)(\frac{1}{300}+\frac{1}{300})}}=5.358    

Statistical decision

Since is a two sided test the p value would be:  

p_v =2*P(Z>5.358) = 4.2x10^{-8}  

Comparing the p value with the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can say that we have singificantly differences between the two proportions.  

5 0
3 years ago
10+4x =12+3x<br><br> How is this solved?
soldier1979 [14.2K]

Answer:

x=2

Step-by-step explanation:

  1. 10+4x=12+3x
  2. 10+4x-3x=12+3x-3x
  3. 10+x=12
  4. 10+x-10=12-10
  5. x=2

<u><em>FINAL ANSWER</em></u>

<em>x=2</em>

8 0
3 years ago
Read 2 more answers
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