
Mark M. answered 06/16/17
Tutor
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Mathematics Teacher - NCLB Highly Qualified
s represents Sara's speed
Jim:
138 = (s + 5)(t)
138 / (x + 5) = t
Sara
123 = (s)(t)
123 / s= t
138 / (s + 5) = 123 / s
Can you solve for s and answer?