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olga55 [171]
3 years ago
13

You guys I need help on this.

Mathematics
1 answer:
fomenos3 years ago
7 0

Answer:

2

Step-by-step explanation:

All the triangles are similar, so ...

... 4/y - y/9

... 36 = y² . . . . . multiply by 9y

... 6 = y

From the Pythagorean theorem, ...

... x² = 4² + y² = 4² + 6²

... x² = 52 = 4·13

... x = √(4·13) = 2√13

Green Box: 2

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