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leva [86]
3 years ago
7

Which pair of words describes this system of equations? 3y=9x+6 2y−6x=4?

Mathematics
2 answers:
melomori [17]3 years ago
7 0
We can observe that both the equation represent equation y = mx + c

Rewrite the equations in the form of y = mx + c

3y = 9x + 6
=> y = 3x + 2

2y = 6x + 4
y = 3x + 2

m = slope.

Both the equations have m = 3, since only parallel lines have same slope so the answer is Parallel lines.

Hope This Helps You!
deff fn [24]3 years ago
3 0
No answers

parallel lines

same slope

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Marina86 [1]

Answer:

The 99% confidence interval for the true mean checking account balance for local customers is ($439.29, $888.99).

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 14 - 1 = 13

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 13 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 3.0123

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 3.0123\frac{279.29}{\sqrt{14}} = 224.85

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The lower end of the interval is the sample mean subtracted by M. So it is 664.14 - 224.85 = $439.29

The upper end of the interval is the sample mean added to M. So it is 664.14 + 224.85 = $888.99.

The 99% confidence interval for the true mean checking account balance for local customers is ($439.29, $888.99).

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3 years ago
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astra-53 [7]
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2 years ago
What is the length of an arc defined by a 60 degree central angle in a circle with a radius of 5 in.?
Natali [406]

Answer:

5.24 in

Step-by-step explanation:

The arc length is calculated as

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cestrela7 [59]
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I hope this helps :-)
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kap26 [50]

Answer:

3(x + 9)(x + 2)x = 0

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xv1 = −9

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