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bearhunter [10]
3 years ago
6

Someone, please help me with this question.

Mathematics
1 answer:
Viefleur [7K]3 years ago
5 0

Answer:

C.  95°

Step-by-step explanation:

Sumplementary angles sum 180°

144° + a = 180°

a = 180° - 144°

a = 36°

121° + b = 180°

b = 180° - 121°

b = 59°

The sum of internal angles of a triangle is 180°

a + b + c = 180°

36° + 59° + c° = 180°

c° = 180° - (36°+59°)

c° = 180° - 95°

c° = 85°

then:

c + n = 180°

85° + n = 180°

n = 180° - 85°

n = 95°

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It is found that Margo will be using random sampling.

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1 year ago
An art teacher had 2/3 gallon of paint to pour into containers. If he poured 1/8 gallon of paint into each container until he ra
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3 years ago
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What are the solutions of the equation (x + 2)2 + 12(x + 2) – 14 = 0? Use u substitution and the quadratic formula to solve.
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(x + 2)²<span> + 12(x + 2) – 14 = 0

</span>(x +2) ² we use the formula (a+b)² = a² + 2ab + b²
<span>
(x</span>² + 2*2*x + 4 ) + (12*x + 12 * 2 ) - 14 = 0
(x² + 4x + 4) + (12x + 24) - 14 = 0
x² + 4x + 4 + 12x + 24 - 14 = 0

<span>we sort expressions
</span>x² + 4x + 12x + 4 + 24 - 14 = 0

<span>reduce
</span>x² + 16x + 14 = 0 

a = 1    b = 16     c=14

Δ = b² - 4ac = 16² - 4*1*14 = 256 - 56 = 200
√Δ = √(2*10*10) = 10√2

x_{1}  =  \frac{-b -  \sqrt{delty} }{2a}  =  \frac{-16 - 10 \sqrt{2} }{2*1}  =  \frac{-8 -5 \sqrt{2} }{1}  = -8 -5 \sqrt{2}

x_{2}  =  \frac{-b +  \sqrt{delty} }{2a}  =  \frac{-16+ 10 \sqrt{5} }{2*1} =  \frac{-8 + 5 \sqrt{2} }{1}  =  -8 + 5 \sqrt{2}

Answer A


5 0
3 years ago
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4.
andrey2020 [161]

Answer:

Step-by-step explanation:

o.67891

6 0
1 year ago
PLEASE HELP!!!! Explain please!
weqwewe [10]
SA=2(3.14)(4)² + 2(3.14)(4)(9)
SA=2(3.14)(16) + 2(3.14)(36)
SA=(6.28)(16)+(6.28)(36)
SA=100.48+<span>226.08
SA=</span><span>226.08</span>
8 0
3 years ago
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