3 years ago

Is this all correct?

Mathematics

2 answers:

Dmitry_Shevchenko [17]3 years ago

6 0

Yes seth your answers are all corret i seen them i did that paper too

masya89 [10]3 years ago

5 0

Every thing is correct

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For f(x) = 4x+ 1 and g(x) = x2 - 5, find (f+ g)(x).

horrorfan [7]

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4x+1+x^2-5

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3 years ago

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Bumek [7]

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2 years ago

Please help! 30 points!

Rashid [163]

Answer: $64.2^{\circ}$

Step-by-step explanation:

According to the cosine rule

$\cos C=\dfrac{a^2+b^2-c^2}{2ab}$

Here, $a=83, b=111, c=165,\ C=180^{\circ}-\theta$

Putting values

$\Rightarrow \cos (180^{\circ}-\theta)=\dfrac{83^2+111^2-165^2}{2\times 83\times 111}\\\\\Rightarrow \cos(180^{\circ}-\theta)=\dfrac{6889+12321-27225}{18426}\\\\\Rightarrow \cos(180^{\circ}-\theta)=\dfrac{-8015}{18426}=-0.4349\\\\\Rightarrow 180^{\circ}-\theta=\cos^{-1}(-0.4349)=115.77^{\circ}\\\Rightarrow \theta=64.23\approx 64.2^{\circ}$