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FlayMaster101
11.10.2019 •
Mathematics
Child admission is $5.70 and adult admission is $9.50. twice as many adult tickets ad child tickets were sold. for a total of $543.40. how many child tickets were sold
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Ответ:
5.70x + 9.50y = 543.40 . . . (1)
y = 2x . . . (2)
Putting (2) into (1), gives
5.7x + 9.5(2x) = 543.4
5.7x + 19x = 543.4
24.7x = 543.4
x = 543.4/24.7 = 22
Therefore, 22 child tickets were sold.
Ответ:
No your answer is not true
Step-by-step explanation:
( a- b ) ^2= a^2 - 2ab + b ^2