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2 years ago

What's the answer to this

Mathematics

1 answer:

White raven [17]2 years ago

4 0

Step-by-step explanation:

the angle CDB is the supplementary angle to 9x+10 (angle ADC).

that means they stand together for 180°. as all angles around a single point on one side of a line are together always 180°.

and then, the sum of all angles in a triangle is always 180°.

so,

CDB + (4x + 10) + 50 = 180

CDB = 180 - (9x + 10) = 180 - 9x - 19 = 170 - 9x

therefore,

(170 - 9x) + (4x + 10) + 50 = 180

170 - 9x + 4x + 10 + 50 = 180

-5x = -50

5x = 50

x = 10

angle CDB = 170 - 9x = 170 - 90 = 80°

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jeka57 [31]

Answer:

y = 85°

z = 35°

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Step-by-step explanation:

y) 180 - 120 = 60, therefore:

180 - (35 + 60)

=> y = 85

=> z = 35

180 - (35 + 85)

=> x = 60

Hope this helps!

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3 years ago

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mojhsa [17]

Answer:

The answer is B.

Step-by-step explanation:

You have to use Pythogorean Theorem, c² = a² + b² where c is the hypotenuse and a,b is the side lengths :

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Let a = 40,

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*Pythogorean Theorem can only applied in a right-angle triangle.

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3 years ago

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Answer:

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Step-by-step explanation:

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Luden [163]

Answer:

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3 years ago

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