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Mnenie [13.5K]
3 years ago
7

Math help 30 points

Mathematics
1 answer:
mash [69]3 years ago
7 0

Again here we're using like terms

a) -2x² + 12x² = 10x² (they have the same term that's why I grouped them together)

-4x + 2x = -2x

13 - 25 = -12

So the final answer is 10x² - 2x -12

b) 7x² - (-7x²) = 7x² + 7x² or 14x²

4x - (-3x) = 4x + 3x or 7x

-26 - 15 = -41

The final answer to this one is 14x² + 7x - 41

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r = d ÷ 2
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3 years ago
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Given:

m\angle ABC=60

To find:

The m\angle ADC.

Solution:

In circle B, \angle ABC is central angle and \angle ADC is inscribed angle from two points A and C.

According to central angle theorem, central angle is always twice of inscribed angle.

m\angle ABC=2(m\angle ADC)         [Central angle theorem]

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Divide both sides by 2.

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6 0
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A triangle has an angle that measures 115°. The other two angles are in a ratio of 3:10. What are the measures of those two angl
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Answer: 15º and 50º


Explanation:

The angles in a triangle add up to 180.


180 - 115 = 65

3x + 10x = 13x

13x = 65

x = 5


3x = 15

10x = 50


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