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yarga [219]
2 years ago
12

Farmer Brown planted corn and wheat on

Mathematics
1 answer:
siniylev [52]2 years ago
5 0
So you have the system of equations:
C+W=370. Multiply by -135 to remove w
280c+135w=83,300

-135c-135w=-49950
280c+135w=83,300

Add together:
-135c+280c=33,350. W is gone
145c=33,350
c=230.

And substitute c in any of equations to get w:

C+W=370.
230+w=370
W=140.
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3 years ago
Lexie, a bowler, claims that her bowling score is more than 140 points, on average. Several of her teammates do not believe her,
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Answer:

The  test statistic is  t  = 3.744

Step-by-step explanation:

From the question we are told that

  The population mean is  \mu  =  140

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  The  sample size is  n =  18

   The  null hypothesis is  H_o :  \mu =  140

    The  alternative hypothesis is  H_a  :  \mu > 140

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Generally the test statistics is mathematically represented as

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

substituting values

      t  =  \frac{ 155  - 140 }{ \frac{ 17 }{ \sqrt{18} } }

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3 years ago
PLEASE HELP WILL MARK BRAINLIEST
Verizon [17]
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