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Julli [10]
3 years ago
11

Is (1,3) (2,4) and (-2,1) (-3,0) a parallel line?

Mathematics
1 answer:
GREYUIT [131]3 years ago
5 0

Answer:

yes

Step-by-step explanation:

i graphed it buy i dont know how to screenshot on my computer so i cant post it.

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For each function below, determine whether or not the function is injective and whether or not the function is surjective. (You
Harlamova29_29 [7]

Answer: First, injective means that for every y, there is only one x such f(x) = y, and surjective means that if f is a function that goes from the set {x} to the set {y}, for every element y in the codomain there is at least one element x in the domain such f(x) = y

(a) f:R----> + R given by f(x) = x2 (i guess you written x^{2})

The function is not injective, because f(-2) = f(2), and is surjective, because the codomain is +R, and x^{2} is always a positive real number.

(b) f:N----> + N given by f(n) = n2  (i guess you written n^{2})

As the naturals have no negative numbers, in this case the function is injective, but isn't surjective, because there is no number that when squared is equal to 5, for example.

(c) f: Zx Z → Z given by f(n, k) = n +k:

here the domain is of the form (n,k) and the function is n +k, so the numbers (z,w) and (w,z) return the same value when evaluated in f, then f is not injective. And is easy to see that f is surjective, because in the sum you can reach al the integers on the codomain.

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3 years ago
When will two lines tangent to the same circle not intersect?
Mademuasel [1]
The two lines are tangent to the circle at points that are 180 degrees apart.


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Since the sides are equivalent , both of the sides are 44. The formula for hypotenuse is x root 2 making the hypotenuse 44 root 2
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See attached picture.

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