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>.

Since c = <em>u</em>, we know now that the magnitude of <em>u</em> is 7.21
Hope this helps!
Answer:
7.125
Step-by-step explanation:

Two negatives multiply to give a positive and thus we can remove the parenthesis

Converting fractions to decimals.

=7.125
Answer:
x^2-49
Step-by-step explanation:
first you have to combine like terms
//hope this helps//
All but the first should be linear. Im questionable about the last one but the other 2
should definitely be linear
Answer: a
Step-by-step explanation: