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tensa zangetsu [6.8K]
3 years ago
5

Which expression is equivalent to (16 x 8 y - 12) 1 / 2

Mathematics
2 answers:
kari74 [83]3 years ago
5 0

Answer: I don't really know exactly what you are asking for but does this help? 8x4y-6

Step-by-step explanation:

Distribute the 1/2 to each of the factors. If you need me to explain further please let me know :)

liubo4ka [24]3 years ago
4 0

Answer:  8x⁸y - 6

<u>Step-by-step explanation:</u>

(16x^8y - 12) \times \bigg(\dfrac{1}{2}\bigg)\\\\\\=\dfrac{16x^8y}{2}-\dfrac{12}{2}\\\\\\=8x^8y-6

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The difference of a number x and 1/2
Yuliya22 [10]
X - 1/2 (if you meant the difference between)
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3 years ago
Find the solutions to the equation below.
taurus [48]

2x²+7x+3=0

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2x²+1x+6x+3=0

x(2x+1)+3(2x+1)=0

(2x+1)(x+3)=0

2x+1=0. x+3=0

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7 0
3 years ago
At a local university, a sample of 49 evening students was selected in order to determine whether the average age of the evening
pav-90 [236]

Answer:

z=\frac{23-21}{\frac{3.5}{\sqrt{49}}}=4    

p_v =2*P(z>4)=0.0000633  

When we compare the significance level \alpha=0.1 we see that p_v so we can reject the null hypothesis at 10% of significance. So the  the true mean is difference from 21 at this significance level.

Step-by-step explanation:

Data given and notation  

\bar X=23 represent the sample mean

\sigma=3.5 represent the population standard deviation

n=49 sample size  

\mu_o =21 represent the value that we want to test

\alpha=0.1 represent the significance level for the hypothesis test.  

z 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 average age of the evening students is significantly different from 21, the system of hypothesis would be:  

Null hypothesis:\mu = 21  

Alternative hypothesis:\mu \neq 21  

The statistic is given by:

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

Calculate the statistic

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

z=\frac{23-21}{\frac{3.5}{\sqrt{49}}}=4    

P-value

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

p_v =2*P(z>4)=0.0000633  

Conclusion  

When we compare the significance level \alpha=0.1 we see that p_v so we can reject the null hypothesis at 10% of significance. So the  the true mean is difference from 21 at this significance level.

8 0
3 years ago
Convert 3 18/25 to a decimal using long division.
zaharov [31]
Change into improper fraction 
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3 years ago
Elijah and Riley are playing a board game. Elijah chooses the dragon for his game piece, and Riley chooses the cat for hers. The
IgorLugansk [536]

Answer: 3/8

Step-by-step explanation: 7/8 - 1/2= (7*2)-(1*8)

--------------- = 6/16 6 divided by 2 and then 16 divided by 2= 3/8

^8*2

5 0
3 years ago
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