two years ago jenny was four times as old as helen. six years from now , jenny will be twice as old as helen. how old are each o
1 answer:
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Answer:
Explanation:
The figure is a right triangle with:
- hypotenuse = segment AC
- vertical leg = 7 units
- horizontal leg = 4 units
Hence, you must use Pythagora's theorem, which is valid for all right triangles:
Substituting the data:
Square root both sides: