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Leviafan [203]
4 years ago
15

3+12x5/(5+15) What’s the answer

Mathematics
2 answers:
monitta4 years ago
5 0
I think the answer is 6. I’m not sure tho ;-;
r-ruslan [8.4K]4 years ago
3 0

\bf 3+12\times \cfrac{5}{(5+15)}\implies 3+12\times \cfrac{5}{\underset{\uparrow }{20}}\implies 3+12\times \cfrac{1}{4}\implies 3+\cfrac{\stackrel{\downarrow }{12\times 1}}{4} \\\\\\ 3+\cfrac{12}{4}\implies 3+\stackrel{\downarrow }{3}\implies 9

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Liang is ordering new chairs and cushions for his dining room table A new chair cost $88 and a new cushion cost $12 shipping cos
Rasek [7]

Answer:

100c + 34

Step-by-step explanation:

6 0
4 years ago
Read 2 more answers
The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership
Shkiper50 [21]

Answer:

z=\frac{750-800}{\frac{350}{\sqrt{100}}}=-1.429    

Step-by-step explanation:

Data given and notation  

\bar X=750 represent the sample mean

\sigma=350 represent the population standard deviation for the sample  

n=100 sample size  

\mu_o =800 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

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

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is lower than 800, the system of hypothesis would be:  

Null hypothesis:\mu \geq 800  

Alternative hypothesis:\mu < 800  

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

z=\frac{750-800}{\frac{350}{\sqrt{100}}}=-1.429    

5 0
4 years ago
What is the value of the expression? −34+(110÷25)
AVprozaik [17]
First, since you are using the order of operations (PEMDAS), you would start in the parenthesis. 
<span>-34 + (110 ÷ 25)
-34 + 4.4

Now, you just add the two numbers. 
</span>-34 + 4.4 = -29.6

-34 + (110 ÷ 25) = -29.6

I hope this helps!
4 0
4 years ago
Read 2 more answers
The question is the picture
BabaBlast [244]
Tha answer is 80+45+1.00
7 0
3 years ago
If the cost of a dozen eggs rises from .99 to 1.34 what is the percent of the increase
Amiraneli [1.4K]
To find the percent of increase get the difference between the prices and then divided by the oringinal price and then time that by 100

increase = \frac{1.34 - .99}{.99} \times 100
8 0
4 years ago
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