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madreJ [45]
3 years ago
13

The mean is defined as the

Mathematics
1 answer:
Tema [17]3 years ago
7 0
Is the average<span> of the numbers: a calculated "central" value of a set of numbers. To calculate: Just add up all the numbers, then divide by how many numbers there are.</span>
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Please help I’m so lost
Marysya12 [62]

Answer:

<em>u</em> = 7.21

Step-by-step explanation:

The magnitude of <em>u</em> is just the distance between the two points. The coordinates of the left-most point are (-2,-8) and the coordinates of the right point are (4, -4). I'm assuming the x coordinates here because we don't actually know the scale.

Ok so from these points, you can draw a triangle (u can see it in the attached file).

From the coordinates we can tell the lengths of the sides, and the triangle shows that <em>u</em> is the hypotenuse of the triangle. This triangle is also a right triangle, so u can use Pythagoras' theorem to find the length of <em>u</em>.

a^{2}+b^{2} = c^{2} \\6^{2}+4^{2}  = c^{2} \\\sqrt{6^{2} +4^{2} } = c\\\sqrt{36+16} = c\\7.21 = c

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3 years ago
Perform the operation (5x^2 – 9) + (-10x + 7)
Stels [109]

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m

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