Find the lengths of AB and BC. What is the relationship between the lengths? What kind of triangle is ABC?​

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

the answer on ed. is:

c. "the graph of f(x) has exactly two x-intercepts."

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5 i think  

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