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Serhud [2]
2 years ago
12

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
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