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ValentinkaMS [17]
2 years ago
5

Please help! Trigonometry review

Mathematics
1 answer:
charle [14.2K]2 years ago
6 0

Answer: x = 9

Step-by-step explanation:

15 / 20 = (2x + 3) / 28

cross multiply

15(28) = 20(2x + 3)

420 = 40x + 60

360 = 40x

x = 9

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So for this we have to first look for the branch, from the starting node, which shows that student has no lice. From the starting point, the upper branch represents the students that have lice and lower branch represents the students who have no lice. So, we will consider the lower branch with probability mentioned as 0.82

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