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Linear Equations

Answers to pre-test
1(a)  Quartic
1(b)  - 1
1(c)  1
1(d)  0
2(a)  x = 15
2(b)  x = 1
2(c) 
2(d)  x = - 7
2(e)  x = 6
2(f)  x = 30
2(g)  x =  5
2(h) 
2(i)   x = 2
3(a)  x = 2
3(b)  x = - 14
3(c)  x =
4(a)  x-intercept = 2   ;   y-intercept = 3
4(b)  x-intercept =    ; y-intercept =