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Lina20 [59]
3 years ago
11

Sanjai had $175 in his bank account before he got paid this week

Mathematics
2 answers:
Zepler [3.9K]3 years ago
8 0

Answer:

$112

Step-by-step explanation:

To find the amount he got paid, subtract the current amount from the initial amount

so

287 - 175

= 112

KatRina [158]3 years ago
4 0

Hey there!☺

Answer:\boxed{\$112}

Explanation:

Sanjai had $175 in his bank account before he got paid this week. And now his total is $287. Represent x as how many he got after he paid. So that means you do $175 + x = $287.

175+x=287

We have to find x and see how much money he got paid to get 287 in his balance.

287-175=112

x is equal to 112. Let's see if $112 makes x true.

175+112=287

That makes x true which means he got paid $112.

Hope this helps!☺

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A random variable X follows the uniform distribution with a lower limit of 670 and an upper limit of 750.a. Calculate the mean a
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Complete Question

Answer:

a

  SE  = 0.66}

b

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Step-by-step explanation:

From the question we are told that

  The sample size is  n  = 60

   The first sample mean is  \= x _1  =  8

    The second sample mean is   \= x _2  =  10

    The first variance is  v_1 =  0.25

    The first variance is  v_2 =  0.55

Given that  the confidence level is 95% then the level of significance is 5% =  0.05

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

   Z_{\frac{\alpha }{2} } =  1.96

Generally the first standard deviation is  

     \sigma_1 =  \sqrt{v_1}

=>   \sigma_1 =  \sqrt{0.25}

=>   \sigma_1 =  0.5

Generally the second standard deviation is

     \sigma_2 =  \sqrt{v_2}

=>   \sigma_2 =  \sqrt{0.55}

=>   \sigma_2 =  0.742    

Generally the first standard error is

     SE_1  =  \frac{\sigma_1}{\sqrt{n} }

      SE_1  =  \frac{0.5}{\sqrt{60} }

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     SE_2  =  \frac{\sigma_2}{\sqrt{n} }

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      SE  =  \sqrt{SE_1^2 + SE_2^2 }

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=>     SE  = 0.66}

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=>  -3.29 <  \mu_1 - \mu_2 <  -0.70  

 

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