15-11-2020
Mathematics

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Please answer this question!!

Please answer this question class=

Respuesta :

mhanifa mhanifa

15-11-2020

Answer:

12.25

Step-by-step explanation:

It is easy to notice that:

QA=QB=QC

As per triangle congruence theorem (two congruent sides and a right angle)

Since:

QB = x + 9 and QC = 5x - 4

We have

x + 9 = 5x - 4
5x - x = 9 + 4
4x = 13
x = 13/4
x = 3.25

QA = QB = QC = 3.25 + 9 = 12.25

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