3. Two lines or equations are described in each part. Decide whether each system has one solution, no solution, or infinitely ma
ny solutions. Show your work or explain your reasoning.
(a) Line a has a rate of change of 7.
Line b has a rate of change of -7
(b)2x+3y=5.5
4x+6y+11
(c) Line c and line d are parallel
2 answers:
A) slope is 7 for 1 and -7 for the other. These lines intersect in 1 point only
b) both equations have slope -2/3 and the same intercept, so it is really only one line...infinite solutions
c) parallel lines have 0 solutions
A) One Solution
B) Infinite Solutions
C) No Solutions
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