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Volgvan
3 years ago
6

An earthquake strikes in an isolated area is without food or water. Three crews arrive. One can dispense needed supplies and 35

hours, a second and 70 hours, and a third in 10 hours. How long will it take all three crews working together to dispense food and water?
Mathematics
1 answer:
nirvana33 [79]3 years ago
4 0

Answer:

115 hours.

Step-by-step explanation:

35+70=105

105+10=115 hours

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The tickets for a dance recital cost $5.00 for adults and $2.00 for children. If the total number of tickets sold was 295 and th
dem82 [27]
To solve, you would need to make two equations and substitute one in for the other. Let a = # of adults, and c = # of children

5a + 2c = 1,220
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a + c = 295
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a = 295 - c

5(295 - c) + 2c = 1,220
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-3c = -255

-3c/-3 = -255/-3
c = 85

a + c = 295
a + 85 = 295
     -85    -85
a = 210

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Hope this helps!
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