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2 years ago

NEED HELP ASAP PLEASE :(

Mathematics

1 answer:

fomenos2 years ago

8 0

Answer:

i think y if not 2

Step-by-step explanation

i am very old at this

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when all the kids who tried out for soccer were divided into teams of 15 players, there were exactly eight teams. how many kids

seropon [69]

You would multiply 15 ×8= 120 kids tried out

5 0

3 years ago

Suppose John has a torn tendon and is facing surgery to repair it. The surgeon explains the risks to John: infection occurs in 4

Kryger [21]

Answer:

The probability of not having an infection and the surgery being a success is 0.8478.

Step-by-step explanation:

Hello!

There are several possible outcomes facing surgery to repair a torn tendon:

"Infection" ⇒ P(In)= 0.04

"Repair fail" ⇒ P(F)= 0.12

"both infection and failure" ⇒ P(In∩F)= 0.0078

P(NIn∩S)=?

Where NIn represents "no infection" and S represents "successful surgery"

The event "no infection" is complementary to the event "infection" and so is it's probability P(NIn)= 1 - P(In)= 1 - 0.04= 0.96

The event "successful surgery" is complementary to the event "Repair fail" and so is it's probability: P(S)= 1 - P(F)= 1 - 0.12= 0.88

"Repair fail" ; "successful surgery"; Total

"Infection" : P(In∩F) ; P(In∩S) ; P(In)

"no infection" : P(NIn∩F) ; P(NIn∩S) ; P(NIn)

P(F) ; P(S) ; 1

P(F) = P(In∩F) + P(NIn∩F)

P(NIn∩F) = P(F) - P(In∩F) = 0.12 - 0.0078= 0.1122

P(NIn∩S)= P(NIn) - P(NIn∩F) = 0.96-0.1122= 0.8478

The probability of not having an infection and the surgery being a success is 0.8478.

I hope it helps!

7 0

3 years ago

The volume of liquid in a beaker decreases at a rate of 3.25 mL/h. What is the change in the volume of the liquid in the beaker

luda_lava [24]

The volume of the beaker after is 6 hours is 19.5

8 0

3 years ago

Read 2 more answers

WILL NAME BRAINLEST ONGG <br> PLEASE HELP

Leona [35]

Answer:

since angle 1 and angle 2 are equal both angles can only be 90.

and given that b is perpendicular to d so angle at point of interception of bd is also 90.

it is also given that c and d are parallel so both line have same angle on point of interception of line a and b and angle formed is also the same on line a and b .....so a and b are parallell

Step-by-step explanation:

8 0

3 years ago

The data below are the number of absences and the final grades of 9 randomly selected students from a statistics class. Calculat

Darina [25.2K]

Answer:

$r=\frac{9(5316)-(70)(740)}{\sqrt{[9(704) -(70)^2][9(62078) -(740)^2]}}=-0.9908$

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

Solution to the problem

In order to calculate the correlation coefficient we can begin doing the following table:

n x y xy x*x y*y

1 2 100 200 4 10000

2 5 88 440 25 7744

3 8 82 656 64 6724

4 6 84 504 36 7056

5 11 73 803 121 5329

6 4 94 376 16 8836

7 17 57 969 289 3249

8 10 78 780 100 6084

9 7 84 588 49 7056

And in order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

For our case we have this:

n=9 $\sum x = 70, \sum y = 740, \sum xy = 5316, \sum x^2 =704, \sum y^2 =62078$

$r=\frac{9(5316)-(70)(740)}{\sqrt{[9(704) -(70)^2][9(62078) -(740)^2]}}=-0.9908$

6 0

2 years ago