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2 years ago

Thank you so much if so

Mathematics

2 answers:

rosijanka [135]2 years ago

4 0

Answer:

Yall need to stop w/ this ¨drop your social¨

Step-by-step explanation:

Alex73 [517]2 years ago

4 0

Answer:

Mathaway, Symbolab, etc.

Step-by-step explanation:

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The mean of a data set of 6 numbers is 8. The mean of a different data set of 6 numbers is 20. Whats the mean of the combined da

Aleksandr [31]

HERE IS YOUR ANSWER HOOMAN:

STEP BY STEP EXPLANATION FAM:

We have a set of four numbers and the mean is 5. We can see that the sum of the values is 20:

$\frac{20}{4}$ =5

We have another set of three numbers whose mean is 12. We can write that as:

$\frac{36}{3}$ =12

To find the mean of the seven numbers together, we can add the values together and divide by 7:

$\frac{20+36}{7}$ = $\frac{56}{7}$ =8

HOPE DIS HELPED FAM

w(ﾟДﾟ)w

3 0

3 years ago

What value of X makes the equation -5x-(-7-4x)=-2(3x-4) true?

rjkz [21]

Answer: x= $\frac{1}{5}$ Makes It True

Explantion: step 1: simplify both sides of the equation. −5x−(−7−4x)=−2(3x−4) −5x+−1(−7−4x)=−2(3x−4)(distribute the negative sign) −5x+(−1)(−7)+−1(−4x)=−2(3x−4) −5x+7+4x=−2(3x−4) −5x+7+4x=(−2)(3x)+(−2)(−4)(distribute) −5x+7+4x=−6x+8 (−5x+4x)+(7)=−6x+8(combine like terms) −x+7=−6x+8 −x+7=−6x+8 step 2: add 6x to both sides. −x+7+6x=−6x+8+6x 5x+7=8 step 3: subtract 7 from both sides. 5x+7−7=8−7 5x=1

If I Helped, Please Mark Me As Brainliest, Have A Great Day :D

3 0

2 years ago

Read 2 more answers

a square sandbox has an area of 42 squareft what is the approximate perimeter of the sandbox to the nearest hundredth

Ugo [173]

The area of a square is its side length squared. So the side length of the square squared is 42, so the side length of the square is sqrt(42). The perimeter of the square is 4 times the side length, or 4sqrt(42), which is approximately 25.92.

3 0

3 years ago

When debby's 3ds is fully charged it last for 8 hours. if she only charged it 3/5 full how long did it last her?

Luba_88 [7]

8*3/5=4.8 hours

Hope that helps

7 0

3 years ago

Read 2 more answers

A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 90% of the time when t

garik1379 [7]

Answer:

a) P[A/B] = 0,019 or P[A/B] = 1,9 %

b) P[A- /B-] = 0,9996 or P[A- /B-] = 99,96 %

Step-by-step explanation:

Bayes Theorem :

P[A/B] = P(A) * P[B/A] / P(B)

The branches of events are as follows

Condition 1 real infection 1/300 and not infection 299/300

Then

1.- 1/300 299/300

When the test is done (virus present) 0,9 (+) 0,15 (-)

2.- 299/300

When the test is done ( no virus ) 0,15 (+) 0,85 (-)

Then:

P(A) = event person infected P(B) = person test positive

a) P[A/B] = P(A) * P[B/A] / P(B)

where P(A) = 1/300 = 0,0033 P[B/A] = 0,9

Then P(A) * P[B/A] = 0,0033*0,9 = 0,00297

P(B) is ( 1/300 )*0,9 + (299/300)*0,15

P(B) = 0,0033*0,9 + 0,9966*0,15 ⇒ P(B) = 0,1524

Finally

P[A/B] = 0,00297 /0,1524

P[A/B] = 0,019 or P[A/B] = 1,9 %

b) Following sames steps:

P[A- /B-] = (299/300) * 0,85 / (299/300) * 0,85 + (1/300 * 0,1)

P[A- /B-] = 0,8471 /0,8474

P[A- /B-] = 0,9996 or P[A- /B-] = 99,96 %

6 0

2 years ago