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sergij07 [2.7K]
3 years ago
15

Please find the unknown with all steps ​

Mathematics
1 answer:
kirill [66]3 years ago
4 0

Answer:

see explanation

Step-by-step explanation:

Since AC = BC then ΔABC is isosceles with base angles

∠BAC =∠ABC, thus

3x + x = 70

4x = 70 ( divide both sides by 4 )

x = 17.5

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

∠ADC is an external angle of ΔABD and the external angle is equal to the 2 opposite interior angles, hence

y = 70 + x = 70 + 17.5 = 87.5

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In ∆ABC the angle bisectors drawn from vertices A and B intersect at point D. Find m∠ADB if: m∠C=130°
Zepler [3.9K]

Answer:

  m∠ADB = 155°

Step-by-step explanation:

  m∠ADB = (m∠C)/2 + 90° = 130°/2 + 90°

  m∠ADB = 155°

_____

Reference brainly.com/question/17443119 for the derivation.

3 0
3 years ago
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X3 + 2xsquared - x - 2 = (x + 6_)(x + 2_)(x + 4_)
Anon25 [30]
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Part 2 to that question answer right pls
Marta_Voda [28]

Answer:

1. decreases

2. 31.50

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It decreases because there's a negative sign.

It's 31.50 because 10.50 * 3 = 31.50

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3 years ago
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From the given figure,write the corresponding angle of puv​
zepelin [54]

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Step-by-step explanation:

Corresponding angles are angles which occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, the corresponding angles are equal.

By that - the bottom angle RVN can be an example of corresponding angles.

Please give brainliest!

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2 years ago
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-3x+3y=12
max2010maxim [7]

Answer:

C

Step-by-step explanation:

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  2. Compare y = x + 4 and y = x + 4: they are equal, thus the same slope (1) and the same y-intercept (4)

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