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3 years ago

HELP MEEEEEE PLSSS <333

Mathematics

2 answers:

Vinvika [58]3 years ago

5 0

Answer:

no it isn't bestie

Step-by-step explanation:

plug in (0.5, 4) which is (x, y) into the system of equations

it only worked for the first one:

-2(4) - 0.5 = -8.5

-8 - 0.5 = -8.5

did not work:

-2(0.5) - 4 = -5

-1 -4 = -3, not -5

sesenic [268]3 years ago

3 0

Answer:

Step-by-step explanation:

Replace 0.5 for each x, and 4 for each y, and then solve.

-2y - x = -8.5 - 2x - y = -5

-2(4) - 0.5 = -8.5 - 2(0.5) - 4 = -5

-8 - 0.5 = -8.5 - 1 - 4 = -5

-8.5 = -13 = -5

These numbers are not equal to each other, so the answer is no.

You might be interested in

What is the probability that a random person who tests positive for a certain blood disease actually has the disease, if we know

xeze [42]

Answer:

Step-by-step explanation:

Hello!

Any medical test used to detect certain sicknesses have several probabilities associated with their results.

Positive (test is +) ⇒ P(+)

True positive (test is + and the patient is sick) ⇒ P(+ ∩ S)

False-positive (test is + but the patient is healthy) ⇒P(+ ∩ H)

Negative (test is -) ⇒ P(-)

True negative (test is - and the patient is healthy) ⇒ P(- ∩ H)

False-negative (test is - but the patient is sick) ⇒ P(- ∩ S)

The sensibility of the test is defined as the capacity of the test to detect the sickness in sick patients (true positive rate).

⇒ P(+/S) = P(+ ∩ S)

P(S)

The specificity of the test is the capacity of the test to have a negative result when the patients are truly healthy (true negative rate)

⇒ P(-/H) = P(- ∩ H)

P(H)

For this particular blood disease the following probabilities are known:

1% of the population has the disease: P(S)= 0.01

95% of those who are sick, test positive for it: P(+/S)= 0.95 (sensibility of the test)

2% of those who don't have the disease, test positive for it: P(+/H)= 0.02

The probability of a person having the blood sickness given that the test was positive is:

P(S/+)= P(+ ∩ S)

P(+)

The first step you need to calculate the intersection between both events + and S, for that you will use the information about the sickness prevalence in the population and the sensibility of the test:

P(+/S) = P(+ ∩ S)

P(S)

P(+/S)* P(S) = P(+ ∩ S)

P(+ ∩ S) = 0.95*0.01= 0.0095

The second step is to calculate the probability of the test being positive:

P(+)= P(+ ∩ S) + P(+ ∩ H)

Now we know that 1% of the population has the blood sickness, wich means that 99% of the population doesn't have it, symbolically: P(H)= 0.99

Then you can clear the value of P(+ ∩ H):

P(+/H) = P(+ ∩ H)

P(H)

P(+/H)*P(H) = P(+ ∩ H)

P(+ ∩ H) = 0.02*0.99= 0.0198

Next you can calculate P(+):

P(+)= P(+ ∩ S) + P(+ ∩ H)= 0.0095 + 0.0198= 0.0293

Now you can calculate the asked probability:

P(S/+)= P(+ ∩ S) = 0.0095 = 0.32

P(+) 0.0293

I hope it helps!

6 0

3 years ago

Wyatt is training for a race. He will run 3

Nady [450]

You take 3/4 and multiply that by eight and you’ll get 6

8 0

4 years ago

Read 2 more answers

find the slope of the line on the graph write your answer as a fraction or a whole number not a mixed number or decimal

Alexandra [31]

The slope is (4,3). You look at the y intercept (where the y axis is crossed by the line) and simply count rise over run until you reach the next point. The next point from the y intercept (-2,0) is (2,3).

-2+4=2
0+3=3

And there you go. In fraction form it’s 4/3.
Hope this helped!

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3 years ago

Can somebody please help me with this question

Tom [10]

Answer:

number 2

Step-by-step explanation:

A cougar did not attack to the victim.ibthinj this is answer

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3 years ago

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prisoha [69]

The answer is SAS.
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