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Step-by-step explanation:
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Given:
Find the method .
Sol:
2eq(1) + eq(2) then,
Then apply the elimination method.
The law of cosines for this particular situation is b^2 = a^2 + c^2 - 2ac cosB.
Filling in what you know, you have b^2 = 25 + 49 - [2(5)(7)-.1908], which simplifies to b^2 = 74 - 69.8092 which gives you a b^2 value of 4.1908, but you have to take the square root of that so you get a side value for b of 2.05.
6-4 because the equation for slope is m=y2-y1/x2-x1
