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krek1111 [17]
3 years ago
15

How to simplify this

Mathematics
1 answer:
Slav-nsk [51]3 years ago
7 0
Factor it out.
Both exponent cancel out each other which equals 1.
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What is the slope of a line thats is Perpendicular to the line y=8x+5
Bumek [7]
Answer:
8 is the slope . I got m=8 but I got confused where m came from .
8 0
2 years ago
Can someone please help me with this (make sure it’s right)
Mekhanik [1.2K]

Step-by-step explanation:

\tan \angle A =  \frac{3}{6}  \\  \\  \therefore \:  \tan \angle A =  0.5 \\  \\ \therefore \:  \angle A =  { \tan}^{ - 1}  0.5 \\  \\  \therefore \:  \angle A =  { \tan}^{ - 1}  0.5 \\  \\ \therefore \:  \angle A =  { \tan}^{ - 1}  tan(26.565051177 \degree) \\  \\ \therefore \:  \angle A  = 26.57 \degree

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3 years ago
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Cereal costs 2.79 for 16.4 ounces. At this rate how much does 25 ounces of cereal cost? Round to the Nearest Cent.
ankoles [38]

Answer:

$4.25

Step-by-step explanation:

We can create a proportion to find how much 25 oz will cost:

\frac{2.79}{16.4} = \frac{x}{25}

We can cross multiply to find x.

16.4x = 69.75

x = 4.25

So, this means 25 ounces of cereal will be $4.25

5 0
3 years ago
According to the University of Nevada Center for Logistics Management, 6% of all merchandise sold in the United States gets retu
jeka57 [31]

Answer:

p_v =P(z>3.390)=0.000349  

If we compare the p value and the significance level given \alpha=0.1 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 10% of significance the proportion of returns at the Houston store is significantly higher than 0.06 or 6%.

Step-by-step explanation:

1) Data given and notation n  

n=80 represent the random sample taken

X=12 represent number of items returned

\hat p=\frac{12}{80}=0.15 estimated proportion of items returned

p_o=0.06 is the value that we want to test

\alpha=0.1 represent the significance level

Confidence=90% or 0.90

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that proportion of returns at the Houston store was more than the national expectation (0.06):  

Null hypothesis:p\leq 0.06  

Alternative hypothesis:p >0.06  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

3) Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.15 -0.06}{\sqrt{\frac{0.06(1-0.06)}{80}}}=3.390  

4) Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.1. The next step would be calculate the p value for this test.  

Since is a right tailed test the p value would be:  

p_v =P(z>3.390)=0.000349  

If we compare the p value and the significance level given \alpha=0.1 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 10% of significance the proportion of returns at the Houston store is significantly higher than 0.06 or 6%.

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3 years ago
What is the value of x?<br> (4x +7) [5(x-4)]<br><br> Enter your answer in the box.<br> X =
inysia [295]

Answer:

5

Step-by-step explanation:

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2 years ago
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