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Andrej [43]
3 years ago
10

−3a2 − b3 + 3c2 − 2b3 if a = 2, b = −1, and c = 3.

Mathematics
1 answer:
levacccp [35]3 years ago
5 0
<span><span><span><span><span>(<span><span>(<span>−3</span>)</span><span>(2)</span></span>)</span><span>(2)</span></span>−<span><span>(<span>−1</span>)</span><span>(3)</span></span></span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span><span>=<span><span><span><span><span>(<span>−6</span>)</span><span>(2)</span></span>−<span><span>(<span>−1</span>)</span><span>(3)</span></span></span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span><span><span><span>−12</span>−<span><span>(<span>−1</span>)</span><span>(3)</span></span></span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)</span></span></span></span><span>=<span><span><span><span>−12</span>−<span>(<span>−3</span>)</span></span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)


</span></span></span></span><span>=<span><span><span>−9</span>+<span><span><span>(3)</span><span>(3)</span></span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span><span><span>−9</span>+<span><span>(9)</span><span>(2)</span></span></span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span><span><span>−9</span>+18</span>−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span>9−<span><span><span>(2)</span><span>(<span>−1</span>)</span></span><span>(3)

</span></span></span></span><span>=<span>9−<span><span>(<span>−2</span>)</span><span>(3)

</span></span></span></span><span>=<span>9−<span>(<span>−6</span>)

</span></span></span><span>=<span>15</span></span>
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part 3. Find the value of the trig function indicated, use Pythagorean theorem to find the third side if you need it.​
Nat2105 [25]

Answer:  \bold{9)\ \sin \theta=\dfrac{1}{3}\qquad 10)\ \sin \theta = \dfrac{4}{5}\qquad 11)\ \cos \theta = \dfrac{\sqrt{11}}{6}\qquad 12)\ \tan \theta = \dfrac{17\sqrt2}{26}}

<u>Step-by-step explanation:</u>

Pythagorean Theorem is: a² + b² = c²   , <em>where "c" is the hypotenuse</em>

<em />

9)\ \sin \theta=\dfrac{\text{side opposite of}\ \theta}{\text{hypotenuse of triangle}}=\dfrac{4}{12}\quad \rightarrow \large\boxed{\dfrac{1}{3}}

Note: 4² + (8√2)² = hypotenuse²   →   hypotenuse = 12

10)\ \sin \theta=\dfrac{\text{side opposite of}\ \theta}{\text{hypotenuse of triangle}}=\dfrac{16}{20}\quad \rightarrow \large\boxed{\dfrac{4}{5}}

Note: 12² + opposite² = 20²   →   opposite = 16

11)\ \cos \theta=\dfrac{\text{side adjacent to}\ \theta}{\text{hypotenuse of triangle}}=\dfrac{\sqrt{11}}{6}\quad =\large\boxed{\dfrac{\sqrt{11}}{6}}

Note: adjacent² + 5² = 6²   →   adjacent = √11

12)\ \tan \theta=\dfrac{\text{side opposite of}\ \theta}{\text{side adjacent to}\ \theta}=\dfrac{17}{13\sqrt2}\quad =\large\boxed{\dfrac{17\sqrt2}{26}}

Note: adjacent² + 7² = (13√2)²   →   adjacent = 17

5 0
3 years ago
Suppose that the function g is defined, for all real numbers, as follows.
svetoff [14.1K]

Answer:

<em>a) g(-2) = 0</em>

<em>b) g(-1) =1</em>

<em>c) g(4) = 2</em>

Step-by-step explanation:

Given data

g(x) = \frac{-1}{4x+1} if x < -2

g(x) = - (x+1)^{2} +1  if -2\leq x\leq 2

g(x) = 2 if x >2

<u><em>Step( i )</em></u>:-

g(x) = - (x+1)^{2} +1  if -2\leq x\leq 2

put x = -2

g(-2) = -(-2+1)^{2} +1 = -(-1)^{2}+1 = -1+1 =0

<em>g(-2) = 0</em>

<u><em>Step(ii)</em></u>:-

g(x) = - (x+1)^{2} +1  if -2\leq x\leq 2

Put x = -1

g(-1) = -(-1+1)^{2} +1 = -(0)^{2}+1 = -0+1 =1

<em>g(-1) =1</em>

<u><em>Step(iii)</em></u>:-

g(x) = 2 if x >2

<em>g(4) = 2</em>

<em></em>

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3 years ago
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2 years ago
Put these in order from least to greatest kilometer,millimeter,inches,yards,centimeter,miles,meter
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<span>centimeter, inch, yard, meter, kilometer, mile</span>
7 0
2 years ago
Please help will mark brainliest
Wewaii [24]
Since this is a triangle all the angles within the triangle add up to 180 degrees so....
82+(9x+2)+(7x)=180
82+2+16x=180
16x+84=180
16x=96
X=6
If we plug in X to angle(9x+2) and angle (7x) we will get 56 and 42. We can get angle 2 by subtracting 180-42 which is 138
FINAL ANSWER: 138 degrees
4 0
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