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**quiky question before my test tommorow morning!!!**

i can't believe i duno where to find out how to do this:

1) find intersections of the graphs:

x^2+y^2=41

x+2y=6

and

2)which of the following function is equivalent to the following piece function.

x-3, if x>=3

f(x)={

3-x, if x<3

a) g(x)=|x-3| b) g(x)=|x+3| c) g(x)=-|x-3| d)-|x+3| e) none of these

this is off like a study guide checklist for the test.