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densk [106]
3 years ago
5

A multiple-choice question on an economics quiz contains 10 questions with five possible answers each. compute the probability o

f randomly guessing the answers and getting 9 questions correct
Mathematics
1 answer:
Hunter-Best [27]3 years ago
8 0
10C9 * (1/5)^9 * (4/5)^1 = 4.096*10^-6

About 4 chances in 1 million.
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A student solved this problem and said the answer was 2 1 1/2 miles.
Cloud [144]
So do (21/2+49/4)-3/2=You get 21 1/4 miles
Since 21 1/4 is close to 21 1/2,  this answer is reasonable.  So A is the answer
4 0
4 years ago
Number 65 please. Show work. Thanks in advance.
iris [78.8K]

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3 years ago
What is 43 rounded to thenearest hundred
marishachu [46]
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3 years ago
Use the elimination method to solve this system.
leva [86]

Answer:

The solution for this system is: x = -1, y = 1

Step-by-step explanation:

The problem states that we have to solve this system by the elimination method

In the elimination method, we transform the system in such a way that one variable can cancel each other. With this, we find the result of the other variable. Then, we can replace the variable we found in any of the equations, and we have the value of the variable that we had initially canceled.

In this problem, we have the following system:

1) -6x + 5y = 1

2) 6x + 4y = -10

If we add equations 1) and 2), the variable x is going to be eliminated

1) + 2)

-6x + 6x + 5y + 4y = 1 - 10

9y = -9

y = \frac{-9}{9}

y = -1

Now, we can replace the value of y in any of the equations, to find x:

I will replace in equation 2)

6x + 4y = -10

6x + 4(-1) = -10

6x = -6

x = \frac{-6}{6}

x = -1

The solution for this system is: x = -1, y = 1

5 0
3 years ago
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