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KonstantinChe [14]
3 years ago
10

Please help ??????????

Mathematics
1 answer:
dlinn [17]3 years ago
4 0

Answer:

  -9i -j

Step-by-step explanation:

DE has components E - D = (-1, 5) -(8, 6) = (-1-8, 5-6) = (-9, -1). These components are the multipliers for the orthogonal unit vectors (i, j).

In terms of the unit vectors i and j, DE is ...

  DE = -9i -j

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At a hot dog stand they serve regular hot dogs and footling hot dogs at a ratio of 5 to 3. Based on this ratio how many footlong
natta225 [31]
Answer:
45
Step-by-step explanation:
Ratio is 5:3
So total ratio "parts" is 5 + 3 = 8
In total there are 120 dogs served, so each part is:
120/8 = 15 dogs
Since, footlong hot dogs are "3" parts, and each part is 15 dogs, there will be:

3 * 15 = 45 footlong hotdogs
3 0
3 years ago
How do i solve for this? 19-13p=-17p-5=
Vsevolod [243]
19-13p=-17p-5
+5                +5
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3 years ago
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3. A new process has been developed for applying pho­ toresist to 125-mm silicon wafers used in manufac­ turing integrated circu
dlinn [17]

Answer:

a

The null hypothesis is  H_o : \mu  =  13.4000

The alternative hypothesis is  H_a :  \mu \ne  13.4000

The null hypothesis is rejected

b

The  99% confidence level is   13.3930  < \mu  < 13.3994

Step-by-step explanation:

From the question we are told that

  The sample size is  n =  10

   The  population mean is  \mu =  13.4 000 \  angstroms

   The level of significance is  \alpha =  0.05

   The  sample data is  

13.3987, 13.3957, 13.3902, 13.4015, 13.4001, 13.3918, 13.3965, 13.3925, 13.3946, and 13.4002

Generally the sample mean is mathematically represented as

        \= x =  \frac{13.3987+ 13.3957\cdots +13.4002 }{10}

=>     \= x = 13.3962

Generally the sample standard deviation  is mathematically represented as

    \sigma = \sqrt{\frac{\sum (x_i - \= x)^2}{n} }

=> \sigma = \sqrt{\frac{ (13.3987 - 13.3962)^2 +  (13.3987 - 13.3962)^2 + \cdots + (13.3987 -13.4002)^2  }{10} }

=>  \sigma =0.0039

The null hypothesis is  H_o : \mu  =  13.4000

The alternative hypothesis is  H_a :  \mu \ne  13.4000

Generally the test statistics is mathematically represented as

      z  =  \frac{\= x - \mu}{\frac{\sigma}{\sqrt{n} } }

=>    z  =  \frac{13.3962 -  13.4000}{\frac{0.0039}{\sqrt{10} } }

=>   z =  3.08

Generally the p-value is mathematically represented as

       p-value  = 2P( z   >  3.08)

From the z-table  P(z >  3.08)= 0.001035

So

       p-value  = 2* 0.001035

      p-value  = 0.00207

So from the obtained value we see that

     p-value  < \alpha

Hence the null hypothesis is rejected

Consider the b question

Given that the confidence level is  99%  then the level of significance is

    \alpha =  (100 -99)\%

=> \alpha =  0.01

Generally from the normal distribution table critical value  of  \frac{\alpha }{2} is  

    Z_{\frac{\alpha }{2} } =  2.58

Generally the margin of error is mathematically represented as  

     E =  Z_{\frac{\alpha }{2} } *  \frac{\sigma}{\sqrt{n} }

=>   E = 2.58  *  \frac{0.0039}{\sqrt{10} }

=>    E = 0.00318

Generally the 99% confidence interval is mathematically represented as

     13.3962   - 0.00318  < \mu  < 13.3962   +  0.00318

=>   13.3930  < \mu  < 13.3994

 

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Answer:

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Step-by-step explanation:

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Why are handcuffs like souvenirs?
ArbitrLikvidat [17]

<u>Part A)</u> 7(a+b)=7a+

Using the distributive property

7(a+b)=7a+7b

therefore

<u>the answer Part A is</u>

9-----> A

<u>Part R)</u>  4(5+x)=20+

Using the distributive property

4(5+x)=20+4x

therefore

<u>the answer Part R is</u>

14-----> R

<u>Part Y)</u> 3(2x+9)=6x+

Using the distributive property

3(2x+9)=6x+27

therefore

<u>the answer Part Y is</u>

4-----> Y

Part S)  8(3x+1)=+8

Using the distributive property

8(3x+1)=24x+8

therefore

<u>the answer Part S is</u>

23-----> S

<u>Part O)</u>  a(4+b)=+ab

Using the distributive property

a(4+b)=4a+ab

therefore

<u>the answer Part O is</u>

17-----> O  

<u>Part E)</u> x(y+10)=+10x

Using the distributive property

x(y+10)=xy+10x

therefore

<u>the answer Part E is</u>

3-----> E

<u>Part I)</u> 2(7x+4y)=14x+

Using the distributive property

2(7x+4y)=14x+8y

therefore

<u>the answer Part I is</u>

20-----> I

<u>Part D)</u> 6(9+5x)=54+

Using the distributive property

6(9+5x)=54+30x

therefore

<u>the answer Part D is</u>

10-----> D  

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Using the distributive property

x(a+3b)=ax+3bx

therefore

<u>the answer Part W is</u>

18-----> W

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Using the distributive property

a(8x+2y)=8ax+2ay

therefore

<u>the answer Part E is</u>

7-----> E

<u>Part T)</u> 0.5(4a+10)=2a+

Using the distributive property

<u>Part T)</u> 0.5(4a+10)=2a+5

therefore

<u>the answer Part T is</u>

1-----> T

<u>Part R)</u> (2/3)(12+9y)=8+

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(2/3)(12+9y)=8+6y

therefore

<u>the answer Part R is</u>

6-----> R  

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5x+5y=5(x+y)

therefore

<u>the answer Part O is</u>

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9a+9b=9(a+b)

therefore

<u>the answer Part T is</u>

22-----> T

Part W) 4m+4n=\ (m+n)

4m+4n=4(m+n)

therefore

<u>the answer Part W is</u>

16-----> W

<u>Part H)</u> ab+3a=a(b+\ )

ab+3a=a(b+3)

therefore

<u>the answer Part H is</u>

2-----> H  

<u>Part E)</u> xy+15x=\ (y+15)

xy+15x=x(y+15)

therefore

<u>the answer Part E is</u>

11-----> E

Part A) bu+uv=\ (b+v)

bu+uv=u(b+v)

therefore

<u>the answer Part A is</u>

5-----> A

<u>Part F)</u> (2/5)m+(2/5)n=(2/5)( \ +n)

(2/5)m+(2/5)n=(2/5)(m+n)

therefore

<u>the answer Part F is</u>

12-----> F

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(3/4)a+(3/4)b+(3/4)c=(3/4)(a+b+c)

therefore

<u>the answer Part M is</u>

8-----> M  

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4kx+11ky=k(4x+11y)

therefore

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<u>the answer is</u>

they are made for two wrists

4 0
3 years ago
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