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Arte-miy333 [17]
3 years ago
11

You found the outfit of your dreams. If you buy all of the pieces,you will get a discount of 30%. Should you buy the whole outfi

t? You already have a similar pair of shoes. Should you just buy the other items (not the shoes) without the discount
Mathematics
1 answer:
Mrac [35]3 years ago
4 0
Mel - So this is purely in theory, right? 

If you were my kid, I'd ask you how much the shoes were. I actually ask myself a similar question when I get asked to buy a combo- if I want a burger and drink, they'll ask if I want fries. It would literally cost me like .10 for the fries. I won't eat them but I can give them to a student or something so, sure, I'll get the combo. 

Does that make any kind of sense? 
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13. You went to the grocery store and spent $12.95. You bought milk for $3.49, eggs for
Brrunno [24]

Answer:

3.24

Step-by-step explanation:

add the milk, eggs and cereal then subtract it by 12.95

3 0
3 years ago
-5+13=k<br><img src="https://tex.z-dn.net/?f=%20-%205%20%2B%2013%20%3D%20k" id="TexFormula1" title=" - 5 + 13 = k" alt=" - 5 + 1
Vikentia [17]
Use the communicative property of addition to switch to order and you get
13 - 5, so the answer is 8, or k = 8

OR

-5 + 13 = k
Combine like terms
8 = k
or
k = 8<span />
5 0
3 years ago
Please help me asap!!!
kolezko [41]

Answer:

The answer is A $100

Step-by-step explanation:

since 0 deposits is $50 and 1 deposit is $150

you do 150-50 which is 100

4 0
3 years ago
What is the height of the prism shown below?<br> 25<br> 13<br> 7<br> 10
maksim [4K]
13 inches is the height
7 0
3 years ago
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by Georgia and Ohio. A sample of 60 bonds i
slavikrds [6]

Answer:

Since our calculated value is outside than our critical value,z_{calc}=-136.438, we have enough evidence to reject the null hypothesis at 5% of significance. So there is not nough evidence to conclude that mean for Ohio it's significantly different than the mean for Georgia.

Step-by-step explanation:

1) Data given and notation  

\bar X_{1}=3.6 represent the mean for Georgia  

\bar X_{2}=4.15 represent the mean for Ohio  

s_{1}=0.03 represent the population standard deviation for Georgia

\sigma_{2}=0.01 represent the population standard deviation for Ohio

n_{1}=60 sample size for Georgia  

n_{2}=80 sample size for Ohio  

z would represent the statistic (variable of interest)

p_v represent the p value  

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the means are different for both groups, the system of hypothesis would be:

H0:\mu_{1} = \mu_{2}  

H1:\mu_{1} \neq \mu_{2}  

If we analyze the size for the samples both are higher than 30, we can assume that the normal distribution is the correct disirbution for the statistic, so for this case is better apply a z test to compare means, and the statistic is given by:  

z=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}} (1)  

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.  

3) Calculate the statistic  

We have all in order to replace in formula (1) like this:  

z=\frac{3.6-4.15}{\sqrt{\frac{0.03^2}{60}+\frac{0.01^2}{80}}}=-136.438  

4) Find the critical value

In order to find the critical value we need to take in count that we are conducting a two tailed test, so we are looking on the normal standard distribution a value that accumulates 0.025 of the area on the right and 0.975 of the area on the left. We can us excel or a table to find it, for example the code in Excel is:

"=NORM.INV(1-0.025,0,1)", and we got z_{critical}=\pm 1.96

5) Statistical decision

Since our calculated value is outside than our critical value,z_{calc}=-136.438, and outside of (-1.96,1.96), we have enough evidence to reject the null hypothesis at 5% of significance. So there is not nough evidence to conclude that mean for Ohio it's significantly different than the mean for Georgia.

8 0
3 years ago
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