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3 years ago

Please take a look at the picture

Mathematics

2 answers:

Blizzard [7]3 years ago

8 0

B?

…………………………………………………..

Mademuasel [1]3 years ago

8 0

$\implies {\blue {\boxed {\boxed {\purple {\sf {C.\:None\:of\:the\:above.}}}}}}$ ✔

$\:\large{\boxed{\frak{ Step-by-step\:explanation: }}}$

A. $x - ( - x) = -x$

Let us first solve for L. H. S.

We have,

$x - ( - x)$

$= x + x$

$= 2x$

$≠ - x$

$≠ R. H. S.$

Hence, option A is incorrect.

B. $0 - ( - x) = - x$

Solving for L.H.S. , we have

$= 0 - ( - x)$

$= + x$

$≠ - x$

$≠ R. H. S.$

Hence, option B is ruled out too.

Therefore, the correct answer is $\sf\red{ option\:C}$ .

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Consider two medical tests, A and B for a virus. Test A is 90% effective at recognizing the virus when it is present, but has a

Licemer1 [7]

P(V|A) is not 0.95. It is opposite:

P(A|V)=0.95

From the text we can also conclude, that

P(A|∼V)=0.1

P(B|V)=0.9

P(B|∼V)=0.05

P(V)=0.01

P(∼V)=0.99

What you need to calculate and compare is P(V|A) and P(V|B)

P(V∩A)=P(A)⋅P(V|A)⇒P(V|A)=P(V∩A)P(A)

P(V∩A) means, that Joe has a virus and it is detected, so

P(V∩A)=P(V)⋅P(A|V)=0.01⋅0.95=0.0095

P(A) is sum of two options: "Joe has virus and it is detected" and "Joe has no virus, but it was mistakenly detected", therefore:

P(A)=P(V)⋅P(A|V)+P(∼V)⋅P(A|∼V)=0.01⋅0.95+0.99⋅0.1=0.1085

7 0

3 years ago

Jacks average in math for the first nine weeks was an 88 . His second nine weeks average decreased 12.5% what was his average fo

ikadub [295]

10% of 88 = 8.8

2.5% of 88 = 2.2

2.2 + 8.8 = 11

88 - 11 = 77

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3 years ago

Read 2 more answers

Simplify the expression. Write the answer using scientific notation. (4 × 108)2 16 × 1016 1.6 × 1016 8 × 1017 1.6 × 1017

sammy [17]

Answer:

$\large\boxed{\bigg(4\times10^8\bigg)^2=1.6\times10^{17}}$

Step-by-step explanation:

$\text{The sicientific notation:}\ a\times10^k,\ \text{where}\ 1\leq a10\\\\=1.6\times10\times10^{16}\qquad\text{use}\ a^n\times a^m=a^{n+m}\\\\=1.6\times10^{17}$

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3 years ago

Find the range of the inequality 2e-3< 3e-1

serg [7]

Answer:

$x = { - 1, 0,1 ,2 ...}$

Step-by-step explanation:

$2e - 3 < 3e - 1 = 2e - 3e < - 1 + 3 = - 1e < 2 = e > - 2$

Hope this helps ;) ❤❤❤

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3 years ago

I’ll send a picture of problem and graph I don’t know how to write it out on here.

JulsSmile [24]

• Given the table of values, you can identify these points:

$(0,4),(1,8),(2,12),(3,16),(5,24),(6,28),(7,32)$

If you plot them on a Coordinate Plane, you get:

As you can observe, it is a Linear Function.

• The equation of a line in Slope-Intercept Form is:

$y=mx+b$

Where "m" is the slope of the line and "b" is the y-intercept.

In this case, you can identify in the graph that:

$b=4$

Therefore, you can substitute that value and the coordinates of one of the points on the line, into this equation:

$y=mx+b$

And then solve for "m", in order to find the slope of the line.

Using this point:

$(1,8)$

You get:

$\begin{gathered} 8=m(1)+4 \\ 8-4=m \\ m=4 \end{gathered}$

Therefore, the equation for the data in Slope-Intercept Form is:

$y=4x+4$

Hence, the answer is:

• It represents a Linear Function.

• Equation:

$y=4x+4$

8 0

1 year ago