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Afina-wow [57]
4 years ago
6

What is 7 and 8? A and B

Mathematics
2 answers:
victus00 [196]4 years ago
6 0
Yes I agree!!! :D hope u get it correct in class or what ever
Lerok [7]4 years ago
3 0
7. For a triangle to be equilateral, all 3 sides must be of equal length. This implies that all corners must be equal. To find out if this is the case we have to find variable x. Never draw conclusions from the drawing.

We know that all corners of the triangle should add up to 180. So:

2x + 2x + (3x-30) = 180 => 7x = 210 => x=30

Also, 2x = 3x-30. All cornders are 60°!

So yes, this triangle is indeed equilateral. If it is equilateral, it is for sure also isosceles (for that, only two sides need to be the same).

8.A circumcenter
8.B incenter

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A sample of 100 independent random numbers is taken from this distribution, and its average is used to estimate the mean of the
Mariulka [41]

Answer:

The standard error in estimating the mean = (0.1 × standard deviation of the distribution)

Step-by-step explanation:

The standard error of the mean, for a sample, σₓ is related to the standard deviation, σ, through the relation

σₓ = σ/(√n)

n = sample size = 100

σₓ = σ/(√100)

σₓ = (σ/10) = 0.1σ

Hence, the standard error in estimating the mean = (0.1 × standard deviation of the distribution)

4 0
3 years ago
Which expression is equal to (−4x2−1)(2x2+3)?
Leya [2.2K]

Answer:

The first one:

−8x4−14x2−3

Step-by-step explanation:

(-4•2-1)(2•2+3)

-4•2 = -8

-8 - 1 = -9

(-9)(2•2+3)

2•2 = 4

4+3 = 7

(-9)(7) = -63

Now we find the one that equals -63:

-8•4-14•2-3

(-8•4)-14•2-3

-32-14•2-3

-32-(14•2)-3

-32-28-3

(-32-28)-3

-60-3

-60-3 = -63

BAM! THE ANSWER!

7 0
3 years ago
Read 2 more answers
Select all that justify the following statement.<br><br> 2 • = 1
Dvinal [7]
Try using negative numbers

6 0
4 years ago
7) 2x + y = 7<br> What is the intercept
posledela

Answer:

2x + y = 7

x=7/2

y=7

Step-by-step explanation:

to find y itercept =0

to find x intercept=0

5 0
3 years ago
20 yd<br> 17 var<br> 15 yd<br> 16 yd<br> 17 yd<br> 6 in<br> I need the surface area
Triss [41]

Answer:

1120 yards cubed

Step-by-step explanation:

hope this helps

have a good day

3 0
2 years ago
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