Answer:
38°
Step-by-step explanation:
a²=b²+c²-2bc cos A
5²=3²+7²-2(3)(7) cos A
-33 = -42 cos A
A = (-33/-42)
A = 38°
The solution I got is (4,2)
When I plotted the equations on a graph, they intercepted at (4,2).
6-x=y it will take 22 hours
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