2 years ago

Please answer quickly!!!

Mathematics

1 answer:

yKpoI14uk [10]2 years ago

3 0

Answer:

$c=20$

Step-by-step explanation:

The diagonals of a rectangle always bisect each other. Therefore, we can set $QT=ST$ :

$c=4c-60,\\-3c=-60,\\c=\fbox{20}$

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