Answer:
1/5
Step-by-step explanation:
Total marbles = 20
Black marbles = 10
(10/20) x (4/10)
= (1/2) x (2/5)
= 2/10
= 1/5
4(2p−1)
3x + 4y = 108
2x + 3y = 77
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answer:
x= adult = $16
y= child = $15