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Hatshy [7]
3 years ago
11

In any triangle the angles add up to 180. i triangle abc angle a is twice as large as angle b is 4 degrees larger than angle

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
3 0
A + b + c = 180

a = 2b

b = c + 4

Substitute the b equation into the a equation

a = 2(c + 4)

a = 2c + 8

Substitute equations a and b into the first equation

2c + 8 + c + 4 + c = 180

4c = 168

c = 42

Find the other angles using c

b = 42 + 4

b = 46

a = 2(42) + 8

a = 92

Therefore angle a is 92 degrees, angle b is 46 degrees, and angle c is 42 degrees.
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For the following pair of functions, find (f+g)(x) and (f-g)(x).
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Given:

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g(x)=-9x^2+4x-13

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We know that,

(f+g)(x)=f(x)+g(x)

(f+g)(x)=4x^2+7x-5-9x^2+4x-13

(f+g)(x)=(4x^2-9x^2)+(7x+4x)+(-5-13)

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(f-g)(x)=13x^2+3x+8

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