Here, as I can see, you are adding fractions, and making sure you have a common denominator.
12) is correct
13) is correct
You got a common denominator, and added them up! Great job! <span />
Answer:
I believe it's 12
Step-by-step explanation:
I hope this helps
There are 24 possible answers, 6 are correct answers and 18 are incorrect answers. By use of the hypergeometric distribution the probabilities of each possible number of randomly selected correct answers can be found, as follows:
P(0) = 0.1379, P(1) = 0.3819, P(2) = 0.341, P(3) = 0.1213, P(4) = 0.017, P(5) = 0.0008, P(6) = 0.000007.
The expected or mean number of correct answers is found from:
![E(X)=0\times0.1379+1\times0.3819+2\times0.341+3\times0.1213+4\times0.017](https://tex.z-dn.net/?f=E%28X%29%3D0%5Ctimes0.1379%2B1%5Ctimes0.3819%2B2%5Ctimes0.341%2B3%5Ctimes0.1213%2B4%5Ctimes0.017)
![+5\times0.0008+6\times0.000007=1.4998](https://tex.z-dn.net/?f=%2B5%5Ctimes0.0008%2B6%5Ctimes0.000007%3D1.4998)
The answer is: 1.4998
Hi there!
<u><em>Answer:</em></u>
<u><em>t=26</em></u>
<u><em>*The answer must have a positive sign.*</em></u>
Step-by-step explanation:
First, you subtract by 19 from both sides of an equation.
![t+19-19=45-19](https://tex.z-dn.net/?f=t%2B19-19%3D45-19)
Then, you subtract by the numbers from left too right.
![45-19=26](https://tex.z-dn.net/?f=45-19%3D26)
<u><em>Final answer is t=26</em></u>
I hope this helps you!
Have a nice day! :)
-Charlie
:D
Answer:
y = 5 ; x = 4
Step-by-step explanation:
Given :
5x + 6y = 50 - - - (1)
x - 6y = -26 - - - (2)
From (2)
x = - 26 + 6y
Put - 26 + 6y for x in (1)
5(-26 + 6y) + 6y = 50
-130 + 30y + 6y = 50
-130 + 36y = 50
-130 - 50 = - 36y
-180 = - 36y
y = 180 / 36
y = 5
Put y =5 in x = - 26 + 6y
x = - 26 + 6(5)
x = - 26 + 30
x = 4
y = 5 ; x = 4