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ikadub [295]
3 years ago
9

Can someone help? I'll give brainliest if the answer is correct and and if an explanation of how to do this is provided.

Mathematics
1 answer:
NikAS [45]3 years ago
7 0

Answer:

m\angle E = 77°

Step-by-step explanation:

I triangle ACE, BD || AC.... (given)

m\angle B =m\angle A

(corresponding angles)

9x - 5 = 8x + 4

9x - 8x = 5 + 4

x = 9

3x° = 9*3° = 27°

(9x - 5)° = (9*9 - 5)° = (81 - 5)° = 76°

m\angle E = 180° - (27° + 76°)

(By interior angle sum theorem of a triangle)

m\angle E = 180° - 103°

m\angle E = 77°

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Suppose T(n) = n(n +1)/2. Find T(10).
jek_recluse [69]

Answer:

D. 55

Step-by-step explanation:

T(n) =  \frac{n(n +1)}{2} \\  \\ T(10) =  \frac{10(10 +1)}{2}  \\  \\T(10) =  \frac{10\times 11}{2}  \\  \\T(10) =  5 \times 11 \\  \\  \huge \red{ \boxed{T(10) =  55}}

4 0
4 years ago
A point is refected across the x-axis. The new point is (5,-3.5).What is the distance between the two points?
Vesna [10]
When a point is reflected across the x-axis, it's y value is flipped. Here is a formula for your future reference:

X-axis reflection: (x,-y)

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Because the problem asks for the distance between the two points, you now have to find the difference between -3.5 and 3.5, which is 7.

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5 0
4 years ago
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inn [45]
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3 years ago
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Rom4ik [11]

Answer:

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8 0
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