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Allisa [31]
3 years ago
9

What is the coordinate of the midpoint of (2, 1) and (18, 7)?

Mathematics
2 answers:
JulijaS [17]3 years ago
5 0

Answer:(10,4)

Step-by-step explanation:

Mp(x,y)=(2+18/2,1+7/2)=(10,4)

lara31 [8.8K]3 years ago
3 0

Answer:

The midpoint is (10, 4)

Step-by-step explanation:

To find the midpoint, you add the x value from the first coordinate and the x value from the second coordinate, then divide by two to get the x coordinate of the midpoint. You do the the same exact thing with the two y values to find the y coordinate of the midpoint.

2 + 18 = 20

20 / 2 = 10

1 + 7 = 8

8 / 2 = 4

(10, 4)

Hope this helps!

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Calculate the second moment of area of a 4-in-diameter shaft about the x-x and yy axes, as shown.
Keith_Richards [23]
Second moment of area about an axis along any diameter in the plane of the cross section (i.e. x-x, y-y) is each equal to (1/4)pi r^4.
The second moment of area about the zz-axis (along the axis of the cylinder) is the sum of the two, namely (1/2)pi r^4.

The derivation is by integration of the following:
int int y^2 dA
over the area of the cross section, and can be found in any book on mechanics of materials.

6 0
3 years ago
PLS HELPPPP MEEE <br> (explain ur answer)
adell [148]

Answer:

<em>(4). is the correct answer</em>

Step-by-step explanation:

(- 3, 1, 1)

(1). - 3 - 1 - 1 ≠ - 2  not an answer...

(2). - 3 - 1 + 3(1) ≠ 2 not an answer...

(3). 4( - 3) + 1 - 3(1) ≠ - 4 not an answer...

<em>(4). 2(- 3) + 3(1) + 4(1) = 1 </em>

<em>3(1) + 3(1) = 6 </em>

<em>- 3 = - 3(1) </em>

7 0
3 years ago
Which expression equals 102+84
MakcuM [25]

Answer: 6(17+14) or 186

Step-by-step explanation: I provide with you two answers since not sure what u  mean .And the first answer is distributive it and the second answer is the sum.

Also 102 + 84 is an expression already so I don't know what your asking and if this help  u are welcome !

4 0
2 years ago
The principal randomly selected six students to take an aptitude test. their scores were: 81.4 78.6 71.3 77.8 76.9 77.7 determin
Firdavs [7]
The confidence interval is 77.28\pm 2.23.

We first find the mean.  Add together all of the data points and divide by 6, the number of data points; the mean is 77.28.

Next we find the standard deviation.  Find the difference between each data point and the mean; square it; find the sum; divide by the number of data points; take the square root.  The standard deviation is 3.32.

To find the margin of error, we calculate the z-score associated with this level of confidence.  100-90 = 10% = 0.1; 0.1/2 = 0.05; 1-0.05 = 0.95.  Using a z-table (http://www.z-table.com) we see that this is between two scores, 1.64 and 1.65; we will use 1.645.

The margin of error is given by
z * (σ/√n) = 1.645*(3.32/√6) = 2.23.

Thus the confidence interval is 77.28 +/ 2.23.
3 0
3 years ago
How to factor 18a2+6a5-8a3
Zielflug [23.3K]

Answer:

2a^2(3a^3-4a+9)

Step-by-step explanation:

You could change the equation to this: 6a^3a^2-8a^1a^2+18a^2

*This is the exact same as 18a^2+6a^5-8a^3

You can continue to break this down until you get:

2*3a^3a^2-2*4a^1a^2+2*9a^2

*This too = 18a^2+6a^5-8a^3

With this new equation, you can cancel out the common term: 2a^2

You come up with my answer.

<em>Hope this helps!!</em>


7 0
3 years ago
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