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Dvinal [7]
3 years ago
10

Given: a = 640, A = 70°, B = 52° in triangle ABC ; find c . Round answers to the nearest whole number. Do not use a decimal poin

t or extra spaces in the answer or it will be marked incorrect.
Mathematics
1 answer:
telo118 [61]3 years ago
8 0
Law of sines:
\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}\\=\frac{640}{\sin 70}=\frac{c}{\sin (180-70-52)}\\\text{ then}\\c=\frac{640}{\sin 70}\sin (180-70-52)\\=577 
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Solve the simultaneous equations x - 5y = 0 and 15x + 10y = 17
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15x + 10y = 17 (2)

From (1),
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(2) + (3),
17x = 17
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Sub x=1 into (1)
x - 5y = 0
- 5y = -1
y = 1/5

Therefore x = 1, y = 1/5.

Hope it helps : )
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Answer:

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Step-by-step explanation:

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4 years ago
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Step-by-step explanation:

This could help

https://www.jcschools.us/cms/lib03/MO01909951/Centricity/Domain/2287/2-1%207th%20grade%20math.pdf

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Answer:

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