25-02-2021
Mathematics

contestada

What is the value of x?

What is the value of x class=

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altavistard altavistard

25-02-2021

Answer:

x = +5

Step-by-step explanation:

The triangles ADB and BDC are similar. Thus it is possible to write an equation of ratios and solve it for x:

x 10

----- = -------

10 4x

Cross-multipying, we get:

4x^2 = 100, which yields x = +5

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