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Alenkasestr [34]
2 years ago
10

Find the missing length of the triangle. 12 cm 15 cm

Mathematics
1 answer:
Rashid [163]2 years ago
5 0

Answer: 9

Step-by-step explanation:

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if pentagon abcd was reflected over the axis y-axis, reflected over the x-axis, and rotated 180, where would be point A' lie
frez [133]
A reflection over the x axis coupled with another reflection over the y axis leads to a rotation of 180 degrees. 

In other words,

Start with point A. Reflect over the x axis to get point B. Reflect B over the y axis to get point C. To go from A to C, we can rotate A 180 degrees about the origin.

----------------

So this means that if we do those reflections and then do the rotation, then we end up back where we started. Wherever point A is located, the point A' will also be located at the same position with the same coordinates. 
4 0
3 years ago
A line that is perpendicular to y=-4-10 passing through the point (8,11)
guapka [62]

Answer:

Step-by-step explanation:

11=4(8)+b

11=32+b

-21=b

y=4x-21

i think

4 0
2 years ago
the probability that it will rain tomorrow is 0.85what is the probability that it will not rain tomorrow​
bija089 [108]

Answer:

.15

Step-by-step explanation:

Probability of Rain = x

Probabiliy of No Rain = y

Y=1-X

Y=1-0.85

Y=.15

4 0
2 years ago
Help please! show work
e-lub [12.9K]
Your answers are
A = 35.7°
B = 67.6°
C = 76.7°

cosine law

a^2 = b^2 + c^2 -2bc \cos A \\
-2bc \cos A = a^2 - b^2 - c^2 \\ \\
\cos A = \dfrac{a^2 - b^2 - c^2}{-2bc} \\ \\
A = \cos^{-1}\left[ \dfrac{a^2 - b^2 - c^2}{-2bc} \right] \\ \\
A = \cos^{-1}\left[ \dfrac{12^2 - 19^2 - 20^2}{-2(19)(20)} \right]  \\ \\
A = 35.723697

A = 35.723697
sine law for the rest of the angles

\displaystyle
\frac{\sin B}{b} = \frac{\sin A}{a} \\ \\
\sin B = \frac{b \sin A}{a} \\ \\
B = \sin^{-1} \left[ \frac{b \sin A}{a}  \right] \\ \\
B = \sin^{-1} \left[ \frac{19 \sin 35.723697 }{12}  \right]  \\ \\
B \approx 67.58886795

B = 67.58886795
All angles in triangle sum to 180 so find C with that

A + B + C = 180
C = 180 - A - B
C = 180 - 35.723697 - 67.58886795
C = 76.7°

7 0
3 years ago
Write the product in its simplest form
dlinn [17]

Answer:

9u^8v^3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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