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Lelechka [254]
2 years ago
5

12 1/3 - 7 5/7 PLEASE HELP

Mathematics
1 answer:
rjkz [21]2 years ago
4 0

Answer:

4.6190

Step-by-step explanation:

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A group of adults and students went on a class trip to Washington, DC. The number of male students was 1 more than 7 times the n
Helga [31]
In equation, let x be the number of male students
a be the number of adults
y be the number of female students.
x= 7a+1
a= x/7 -1
y= x/2 or (7a + 1)/ 2

a + b = 82, let b be the number of students.
a + (x + y) = 82
a + [7a+1 + (7a+1)/2] = 82
a + [{2(7a+1) + 7a+1} / 2] = 82
a + [(14a +2 + 7a +1) / 2] = 82
a + [(21a + 3) / 2] = 82
(2a+ 21a + 3) / 2 = 82
(23a + 3) / 2 = 82
23a + 3 = 164
23a = 164 -3 
23a = 161
a = 7

x = 7(7) +1, 49+1 = 50 male students
y=x/2, 50/2, 25 female students

50(male students) + 25(female students)  + 7 (adults) = 82





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