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2 years ago

What is the simplified expression for -3cd - d(2c - 4) - 4d?

Mathematics

2 answers:

Luda [366]2 years ago

7 0

Answer:

5cd

Step-by-step explanation:

grin007 [14]2 years ago

4 0

Answer:

The screenshot below should explain the answer

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Express in rectangular form (7(cos 85 degrees + isin 85 degrees))x(2(cos 95 degrees + i sin 95 degrees))

asambeis [7]

After carefully looking over my notes and gathering all my knowledge of college mathematics, I can honestly say that I have no idea what the answer is.

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3 years ago

What is it in standard form

sladkih [1.3K]

Your answer is correct. A

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2 years ago

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Help me with this one pls

arlik [135]

The answer would be d

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2 years ago

In ΔABC, the lengths of a, b, and c are 22.5 centimeters, 18 centimeters, and 13.6 centimeters, respectively.

Irina-Kira [14]

Given the values of the three sides of the triangle, we can apply the Cosine Law to find the angles of the triangle. Recall that for we can express the value of c through the equation below.

$c^{2} = a^{2} + b^{2} - 2abcosC$

Rearranging this equation, we can find the value ∠C as shown below.

$\cos C = \frac{a^{2}+b^{2}-c^{2}}{2ab}$
$C = cos^{-1} (\frac{a^{2}+b^{2}-c^{2}}{2ab})$

We can apply the same reasoning for finding the value of ∠B as shown.

$B = cos^{-1} (\frac{a^{2}+c^{2}-b^{2}}{2ac})$

Plugging in the values of the sides (see image attached) from the given. It will now be straightforward to compute for ∠B and ∠C.

$C = cos^{-1} (\frac{22.5^{2}+18^{2}-13.6^{2}}{2(22.5)(18)})$
$C \approx 37.19$

$B = cos^{-1} (\frac{22.5^{2}+13.6^{2}-18^{2}}{2(22.5)(13.6)})$
$B \approx 53.13$

Answer: ∠C = 37.19° and ∠B = 53.13°

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3 years ago

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A potato chip manufacturer produces bags of potato chips that are supposed to have a net weight of 326 grams. Because the chips

marusya05 [52]

When we take data at work, we always do it over a period of time. To me, just one sample set does not show enough data to come to that conclusion. Also it is one batch of bags. I think you would need to have an average of data from different batches & samples to prove your data is accurate and support your claim.

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2 years ago