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snow_tiger [21]
4 years ago
5

In △CDE , DE=10 , CE=5 , and m∠E=58∘ .

Mathematics
1 answer:
garik1379 [7]4 years ago
6 0

Answer:

8.49 units

Step-by-step explanation:

CD is the length opposite angel E

Use cosine law

CD² = 10² + 5² - 2(10)(5)cos(58)

CD² = 72.00807358

CD = 8.485757101

CD = 8.49 units

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Which graph shows the solution to the following inequality?<br>4d- 6 &lt; 18 <br>PLEASE HELP​
kenny6666 [7]

Answer:

answer a

Step-by-step explanation:

4d-6 < 18

  • Let's isolate d on one side of the equation. Ignore the inequality for now. We'll deal with that later.

4d-6=18\\4d-6+6=18+6\\4d=24\\\frac{4d}{4}=\frac{24}{4}\\ d=6

  • Now, I'm going to bring back the inequality or < symbol. I only removed it when simplifying and isolating d, but if this confuses you, just do your math and keep the inequality there.

d < 6

  • On a number line, this would include every number <em>less than </em>6, due to the < (less than) symbol. This disqualifies answers b and d because they are showing every number <em>greater than </em>6. But, how do we decide between answers a and c?
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4 years ago
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we will then factor to find out value of t that make the function equal to zero
0 = (-4t - 1 ) ( t - 3 )
This means our function equals zero when t = -1/4 s and t = 3 seconds
Since time cannot be negative, our final solution is t = 3 seconds
4 0
2 years ago
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