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astraxan [27]
3 years ago
13

Anybody know the answer?

Mathematics
1 answer:
dsp733 years ago
8 0

So since its a right triangle, we can use the pythagorean theorem, which is leg^2+leg^2=hypotenuse^2 . Since we know that 2 and 3 are our legs and x is our hypotenuse, we can solve the equation as such:

2^2+3^2=x^2\\ 4+9=x^2\\ 13=x^2\\ \sqrt{13}=x

Since √13 can't be further simplified, that is your final answer.

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A healthcare company develops a test for a disease and finds that the probability of receiving a false positive is 0.04. Which o
PolarNik [594]

If 100 healthy people were tested for this disease, the test results from this group would indicate that 96 people did not have the disease and 4 people had the disease.

Answer: Option 1.

<u>Explanation:</u>

Certain sampling and testing are done by the scientists and the doctors about the diseases on the people so that the doctors can come out with the medicinal treatment or some other kind of cure for that particular kind of disease.

In the case that has been discussed in the question above, the people that are suffering from this disease are four people out of hundred people who were tested for the disease.

4 0
3 years ago
1/2x-20-x = 3(2x - 1) - (2x - 1)
yarga [219]

Answer:

x = -4

Step-by-step explanation:

1/2x - 20 - x = 6x -3 -2x +1

-1/2x -20 = 4x -2

-1/2x -4x = -2 +20

-9/2x = 18

9/2x = -18

9x = -36

x = -4

Give brainliest please!

hope this helps :)

5 0
2 years ago
Which net represents this solid figure?<br>Please help, so that I'll get a 100%​
Crank
The one u originally clicked (in yellow) is correct. all sides match perfectly with the figure.
6 0
2 years ago
The mean of 4 test scores is 90. What is the sum of the scores?
shepuryov [24]
360. 
A general rule of thumb when dealing with questions like these is using the following equation:

(number of numbers) x (mean) = sum of numbers

Proof/Example: 7, 10, 13
There are 3 numbers here and the mean is 10. Multiply them together and you will get 30, just as you will get 30 from adding them together. 

In this case, there are 4 numbers and the mean is 90, so 4 x 90 = 360.
5 0
4 years ago
Read 2 more answers
Find the axis of symmetry and the vertex of the graph of y = 3x2 + 2x.
hichkok12 [17]

Step-by-step explanation:

<u>Finding Vertex</u>

Given

y\:=\:3x^2\:+\:2x

The vertex of an up-down facing parabola of the form

y=ax^2+bx+c\:\mathrm{is}\:x_v=-\frac{b}{2a}

The Parabola params are:

a=3,\:b=2,\:c=0

x_v=-\frac{b}{2a}

x_v=-\frac{2}{2\cdot \:3}

x_v=-\frac{1}{3}

\mathrm{Plug\:in}\:\:x_v=-\frac{1}{3}\:\mathrm{to\:find\:the}\:y_v\:\mathrm{value}

y_v=3\left(-\frac{1}{3}\right)^2+2\left(-\frac{1}{3}\right)

    =3\left(-\frac{1}{3}\right)^2-2\cdot \frac{1}{3}

    =\frac{1}{3}-\frac{2}{3}         ∵  3\left(-\frac{1}{3}\right)^2=\frac{1}{3}

    =\frac{1-2}{3}

    =\frac{-1}{3}

\mathrm{Apply\:the\:fraction\:rule}:\quad \frac{-a}{b}=-\frac{a}{b}

   =-\frac{1}{3}

y_v=-\frac{1}{3}

Therefore the parabola vertex is:

\left(-\frac{1}{3},\:-\frac{1}{3}\right)

\mathrm{If}\:a

\mathrm{If}\:a>0,\:\mathrm{then\:the\:vertex\:is\:a\:minimum\:value}

a=3

\mathrm{Minimum}\space\left(-\frac{1}{3},\:-\frac{1}{3}\right)

<u>Finding symmetry</u>

For a parabola in standard form y=ax^2+bx+c

the axis of symmetry is the vertical line that goes through the vertex x=\frac{-b}{2a}

\mathrm{Axis\:of\:Symmetry\:for}\:y=ax^2+bx+c\:\mathrm{is}\:x=\frac{-b}{2a}

a=3,\:b=2

x=\frac{-2}{2\cdot \:3}

x=-\frac{1}{3}

Therefore,

\mathrm{Axis\:of\:Symmetry\:for}\:y=3x^2+2x:\quad x=-\frac{1}{3}

3 0
3 years ago
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