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hoa [83]
4 years ago
13

I need help with number 6 someone please work it out need to show work

Mathematics
1 answer:
icang [17]4 years ago
7 0

Answer:

If I read this diagram correctly then

DE   9x - 31 y    implies that the slope y / x = 9/31 = .29

and arctan .29 = 16 deg

and line CD  7x - 2y  implies that slope y / x = 7/2 = 3.5

and arctan 3.5 = 74 deg  

So in that interpretation the difference is 58 deg

But, I'm not certain of the terminology being used.

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PLEASE HELP ! worth 18 points :)
leonid [27]

Answer:

x = 6.6

Step-by-step explanation:

law of cosines:

x² = b² + c² - 2ac · cosX

x² = 5² + 8² - 2(5 · 8) · cos 55°

x² = 25 + 64 - 80· cos 55°

x² = 25 + 64 - 45.89

x² = 89 - 45.89

x² = 43.11

x = √43.11

x ≈ 6.6

3 0
3 years ago
Solve the system by substitution.<br> y = 5x<br> y = 9x + 4
SVEN [57.7K]

Answer:

(-1, -5)

Step-by-step explanation:

\left \{ {{y=5x} \atop {y=9x+4}} \right.

1. We must calculate x, for that we must substitute y, so we have:

5x=9x+4

2. Now we solve the equation.

5x-9x=4

-4x=4

x=-1

3. Now we must calculate y

y=5x

y=5(-1)

y=-5

And the answer is (-1, -5)

5 0
3 years ago
Isabel finished her English assignment in
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Answer:

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Step-by-step explanation:

6 0
3 years ago
Canbyall help me pleaser​
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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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<h2>good luck</h2>

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3 years ago
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