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Answer:
its d
Step-by-step explanation: i just did it
Please solve with elimination i really need the help!!
please show work
Answer:
x = 6
y = 7
Step-by-step explanation:
Here, (10x - 8y = 4) and (- 5x + 3y = - 9) are two given equation
Now, Name the equation
10x - 8y = 4
take 2 as common we get
2(5x - 4y = 2)
5x - 4y = 2 ...(1)
- 5x + 3y = - 9 ...(2)
Now, Subtract (1) from (2)
5x - 4y = 2
- 5x + 3y = - 9
————————
- y = - 7
y = 7
Now,Put the value of y in equation (1) we get
5x - 4y = 2
5x - 4(7) = 2
5x - 28 = 2
5x = 28 + 2
5x = 30
x = 30÷5
x = 6
Thus,The value of xis6and yis7
FORVERIFICATIONONLY:
5x - 4y = 2
5(6) - 4(7) = 2
30 - 28 = 2
2 = 2
- 5x + 3y = - 9
- 5(6) + 3(7) = - 9
- 30 + 21 = - 9
-9=-9
Hence,L.H.S = R.H.S
-TheUnknownScientist
Answer:
B. (2x+4y)(4x2-8xy+16y2)
Step-by-step explanation:
hope this helps!
Answer:
5:27
Step-by-step explanation:
Answer:
Around 9.57 minutes to edit
Step-by-step explanation:
Do 28 divided by 6 to get around 4.7. Then do 45 divided by 4.7 to get the answer.
B)False
Answer:
And we can find this probability with this difference:
And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem'
Let X the random variable that represent the hous spent studying the week before final exams of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability with this difference:
And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.