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Kay [80]
3 years ago
8

What is the measure that is complementary to an 20 degree angle

Mathematics
1 answer:
defon3 years ago
8 0
I think it would be a 70 degree angle since a 90 degree is a right angle and subtracting from the 20 it would 70 so yep if this is wrong I am sorry.
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What is the value of j(-5)
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2 years ago
If rectangle ABCD, defined by the coordinates A(0, 0), B(0, -4), C(-2, -4), D(-2, 0), is dilated by a scale factor of 2, with re
notsponge [240]

Answer:

D) (-2, -4).

Step-by-step explanation:

Let (x, y) be the center of dilation. Imagine that (x, y) is the center of origin of a new Cartesian Plane. What would the coordinates of point A and A' on the new plane?

  • A: (0 - x, 0 - y) ⇒ (-x, -y).
  • A': (2 - x, 4 - y).

Dilating (-x, -y) about the "origin" of the new plane by a factor of two will give the point (-{\bf 2}x, -{\bf 2}y), also on the new plane.

For coordinates of A' on the original plane,

(-{2}x, -{2}y) = (2 - x, 4 - y).

As a result,

\left \{ \begin{array}{l}-2x = 2 - x\\-2 y = 4 - y\end{array}.

\left \{ \begin{array}{l}-x = 2\\- y = 4\end{array}.

\left \{ \begin{array}{l}x = -2\\y = -4\end{array}.

In other words, {\bf (-2, -4)} is the center of dilation.

6 0
3 years ago
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