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torisob [31]
2 years ago
11

Review the problem below. Determine when the Associative, Commutative, and Additive Inverse properties are used and which operat

ions are taking place.
Original problem (5.2 - 4) -4 + 6.2
Step One (5.2 - 4) +(-4) + 6.2
Step Two 1.2 + (-4) + 6.2
Step Three 1.2 + 6.2 + (-4)
Step Four (1.2 + 6.2) + (-4)
Step Five 7.4 + (-4) = 3.4
Mathematics
1 answer:
solmaris [256]2 years ago
4 0

Answer:

christopher columbus

Step-by-step explanation:

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(5x + ___)^2 = ___ · x^2+70xy + ___
RSB [31]

Step-by-step explanation:

(5x + 7) { }^{2}  = 25 {x}^{2}  + 2(5)(7) + (49)

3 0
4 years ago
Read 2 more answers
Suppose that you need to create a list of n values that have a specific known mean. Some of the n values can be freely selected.
Leno4ka [110]

As the problem indicates, degrees of freedom are the number of values ​​that can be independently selected before it is necessary to choose specific values ​​to arrive at the desired result.

The average, on the other hand, results from the sum of a list of values ​​divided by the amount of values ​​in the summed list.

Assume that the mean sought is x and consider that the list is composed of a single element a, in that case no random number can be selected, since the mean x must correspond to that number.

If the list were composed of two elements a and b, one of the two values ​​could be chosen randomly, and according to the chosen value the second should be the one whose sum with the previous one results in 2x, this given that the formula of the average \sum\limits_{i=1}^n \frac{ x_{i}}{n}.

With three values ​​a, b and c, it is possible to select two freely, since the thirteen must be the one that balances the sum of a+b, that is (a + b) + c = 3x.

Thus, in general, with n values, it is possible to select n-1 values ​​freely whose sum must be balanced by the last value so that the whole sum is nx.

Answer

In a list of \bf{n} values ​​you can assign \bf{n-1} values ​​freely, that is, you have n-1<em>degrees of freedom.</em>

6 0
3 years ago
What type of number is -2343​
VMariaS [17]

Answer:

-2343 is a negative integer

6 0
3 years ago
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What is a reasonable estimate for 8.24 divided by 4? Explain
sashaice [31]
A reasonable estimate for 8.24 divided by 4 would be 2. This would be a reasonable estimate because .24 rlly isn’t all that much so you are able to round down to 8. (Hope that’s right!)
6 0
3 years ago
Solve using elimination.<br><br> –9x + 9y = 18<br> –6x + 9y = –12
Arada [10]
You can multiply either the top or bottom equation by -1 so lets say you apply it to the bottom equation it’ll look like this:

-9x + 9y = 18
6x - 9y = 12

then the +9y and -9y will cancel out

-9x = 18
6x =12

then you add the two equations together

-3x = 30

divide both sides by -3

x = -10
8 0
3 years ago
Read 2 more answers
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