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Nitella [24]
4 years ago
6

3x(x + 2). 3x^2 + 6x alike and different?

Mathematics
2 answers:
meriva4 years ago
7 0
3x(x+2) is in distributive properties, or before this step. The 3x needs to be distributed to the x and the 2.
3x^2+6x is the same expression but worked out.
matrenka [14]4 years ago
3 0

Answer:

Alike

Step-by-step explanation:

3x(x+2) simplifies to 3x^2+6x

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Why isn't 20 over 100 proportional
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It isn't proportional because it is not reduced to the lowest terms

Instead 20 over 100 = 1 over 5


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What is a solution of a linear inequality
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7 0
4 years ago
A researcher conducted a hypothesis test to see if students on average spend more than 1 hour per homework assignment. The level
grandymaker [24]

Answer:

a. True

Step-by-step explanation:

By ∝= 5% we mean that there are about 5 chances in 100 of incorrectly rejecting a true null hypothesis. To put it in another way , we say that we are 95% confident in making the correct decision.

In the given question the null hypothesis is

H0: u ≤ 1 hour and Ha:  u > 1 hour

So there is a 5% chance that the erroneous conclusion will be made that students spend on average more than 1 hour per assignment.

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5 0
3 years ago
A spinner has 10 numbered sections. The arrow on the spinner was spun 30 times, and the results are recorded in the table. Based
Ann [662]
I can’t understand the question can you write it more clearly?
7 0
3 years ago
Read 2 more answers
Suppose the line of best fit is being found for some data points that have an r-value of 0.657. If the standard deviation of the
oksian1 [2.3K]
We are given a line with the following data:

r-value = 0.657 (r)
standard deviation of x-coordinates = 2.445 (Sx)
standard deviation of y-coordinates = 9.902 (Sy)

We are asked to find the slope of the line up to 3 decimal places.

To find the slope of the line, based on the data that we have, we can use this formula:

slope, b = r * (Sy / Sx) 

substitute the values to the formula:

b = 0.657 * ( 9.902 / 2.445 )

Solve for the b.

Therefore, the slope of the line is 

b = 2.66078, round off to three decimal places:

b = 2.661 is the slope of the line. 
5 0
3 years ago
Read 2 more answers
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