biaquinta biaquinta

16-07-2020
Mathematics

contestada

The diagonals in this quadrilateral are 5x-15 and 3x+9. For what value of x is the
quadrilateral a rectangle?

Respuesta :

jimrgrant1 jimrgrant1

16-07-2020

Answer:

x = 12

Step-by-step explanation:

The diagonals of a rectangle are congruent, thus

5x - 15 = 3x + 9 ( subtract 3x from both sides )

2x - 15 = 9 ( add 15 to both sides )

2x = 24 ( divide both sides by 2 )

x = 12

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