Answer:
x = 9
Step-by-step explanation:
The sum of the 4 angles in a quadrilateral = 360°
Sum the given angles and equate to 360
90 + 109 + 9x - 5 + 85 = 360, that is
9x + 279 = 360 ( subtract 279 from both sides )
9x = 81 ( divide both sides by 9 )
x = 9
you solve the square root of 54a*7b*3
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3 divided by 8 = 0.375
0.375 x 100 = 37.5%
37.5% is closest to 38%
1 litre=1000 ml. 1000-250=750. That's your answer.