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4 years ago

10 x = − 19 Give your answer as an improper fraction in its simplest form.

Mathematics

2 answers:

vova2212 [387]4 years ago

8 0

Answer:

-19/10

Step-by-step explanation:

10x= - 19

divide 10 by each side to get -1.9

convert -1.9 to a fraction -1u9/10

then convert it to an improper fraction -19/10

hope this helps;)

Romashka-Z-Leto [24]4 years ago

7 0

Answer:

10/19

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

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Andrew [12]

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3 years ago

Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to determine if there is a differenc

Anettt [7]

Answer:

Z=11.0

Step-by-step explanation:

Let Caucasian individuals be the population 1 and African American be the population 2. So, we are given that

n=150

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standard deviation1=S.D1=σ1=1.1.

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$Z=\frac{xbar1-xbar2}{\sqrt{\frac{V(x1)}{n1}+ \frac{V(x2)}{n2} } }$

$Z=\frac{6.1-4.3}{\sqrt{\frac{1.21}{75}+ \frac{0.81}{75} } }$

$Z=\frac{1.8}{\sqrt{0.0161+ 0.0108 } }$

$Z=\frac{1.8}{\sqrt{0.0269 } }$

$Z=\frac{1.8}{0.164 } }$

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Z=11.0

So, the z value obtained while calculating the test statistic is approximately 11.0.

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3 years ago