Find the value of x to 2dp in the equation 2x² + 5x = 9
1 answer:
Answer:
where x1=-3.71 and x2=1.21
Step-by-step explanation:
<u>first</u><u>=</u><em> </em><em>2</em><em>x</em><em>+</em><em>5</em><em>x</em><em>-</em><em>9</em><em>=</em><em>0</em><em>,</em><em> </em><em> </em><em>a</em><em>=</em><em>2</em><em>,</em><em>b</em><em>=</em><em>5</em><em>,</em><em>c</em><em>=</em><em>-</em><em>9</em><em>,</em><em> </em><em> </em><em>x</em><em>=</em>
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<em>second</em><em> </em><em>x</em><em>=</em>
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<em>x</em><em>=</em>
<em></em>
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Answer:
c. Skewed-right with a mean of $5.25 and a standard error of$0.28
Step-by-step explanation:
As we have given that Sales prices of baseball cards have a right-skewed distribution with a mean $5.25 and a standard deviation is $2.80.
Now, We know that if standard deviation = σ
then, standard error =
As, we have standard deviation = $2.80
then standard error will be
⇒ Standard error = $0.28
Hence, Option (c) is the correct option.