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Umnica [9.8K]
3 years ago
8

Ab^2-4/10 when a=4 b=6

Mathematics
1 answer:
hammer [34]3 years ago
4 0

\huge\text{Hey there!}

\large\boxed{\rm{\dfrac{ab^2 - 4}{10}}}

\large\boxed{\rm{\rightarrow\dfrac{\bold{4(6)}^2 -4}{10}}}

\large\boxed{\rm{6^2}}

\large\boxed{\rm{= 6 \times6}}

\large\boxed{\rm{= \bf 36}}

\large\boxed{\rm{\rightarrow\dfrac{4(\bold{36)}- 4}{10}}}}

\large\boxed{\rm{4(36)}}

\large\boxed{\rm{= \bf 144}}}

\large\boxed{\rm{\rightarrow\dfrac{\bold{144} - 4}{10}}}

\large\boxed{\rm{\bold{144} - 4}}

\large\boxed{= \rm{\bf 140}}}

\large\boxed{\rm{\rightarrow\dfrac{\bold{140}}{10}}}

\large\boxed{\rm{= \bf 14}}

\huge\boxed{\rm{Therefore, your\ answer\ is: \mathsf{14}}}\huge\checkmark

\huge\text{Good luck on your assignment \& enjoy your day!}

~\frak{Amphitrite1040:)}

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A screening examination was performed on 250 persons for Factor X, which is found in disease Y. A definitive diagnosis for disea
ZanzabumX [31]

Answer:

The specificity of this test is expressed as:________

70%.

Step-by-step explanation:

a) Data and Calculations:

TEST RESULTS       Disease Present    Disease Absent      Total

Positive for Factor X      40                            60                    100

Negative for Factor X    10                            140                   150

Total                              50                           200                  250

Negative for X and Disease Absent = 140/200 * 100

= 0.7 * 100

= 70%

b) The specificity refers to the percentage of people who test negative for a specific disease among a group of people who do not have the disease. No test is 100% specific because some people who do not have the disease X will test positive for it (false positive).  Therefore, we are testing for the true negative, that the 140 people who tested out of the 200 people who do not have the disease.

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3 years ago
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(r-s)/r=d would be the rule you use to find the discount when r= regular price and s equals sale price and d= discount
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Why are there two solutions for the equation |6 + y| = 2? Explain.
GaryK [48]

Solution, \left|6+y\right|=2\quad :\quad y=-8\quad \mathrm{or}\quad \:y=-4

Steps:

|f\left(y\right)|=a\quad \Rightarrow \:f\left(y\right)=-a\quad \mathrm{or}\quad \:f\left(y\right)=a, 6+y=-2\quad \quad \mathrm{or}\quad \:\quad \:6+y=2

6+y=-2\quad :\quad y=-8,\\6+y=-2,\\\mathrm{Subtract\:}6\mathrm{\:from\:both\:sides}, 6+y-6=-2-6,\\\mathrm{Simplify}, y=-8

6+y=2\quad :\quad y=-4,\\6+y=2,\\\mathrm{Subtract\:}6\mathrm{\:from\:both\:sides},6+y-6=2-6\\\mathrm{Simplify},y=-4

\mathrm{Combine\:the\:ranges}, y=-8\quad \mathrm{or}\quad \:y=-4

\mathrm{The\:Correct\:Answer\:is\:Because\:of\:the\:absolute\:value,\:It\:could\:be\:Positive\:or\:negative.}

\mathrm{Hope\:This\:Helps!!!}

\mathrm{-Austint1414}

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It is negative association, not positive since the line is going down.
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If you are using a calculator, you just simply plug it in! For example, to convert 3/7 you would do 3 divided by 7 which gives you .428.
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