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Oliga [24]
2 years ago
6

A hostel has food for 60 days if after 15 days 500 more students joined th hostel and the food lasted for 40days only. How many

students were there in hostel
Mathematics
1 answer:
Mice21 [21]2 years ago
4 0

Answer:

625

Step-by-step explanation:

<u>here we are in an inverse proportion situation :</u>

<em>As the number of days increases </em>

<em>when the number of students decreases and vice versa.</em>

__________________

Say n is the original number of students.

___________________________________________

<u>After 15 days, the rest of food is enough for n students for 45 days, </u>

<u>or enough for n+500 students for 25 days.</u>

Then

45n = 25×(n + 500)

Then

45n = 25n + 25×500

Then

45n - 25n = 25×500

Then

20n = 12500

Then

n = 12500÷20

  = 625

and thus , there were 625 students in the hostel.

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17. Oranges cost 25 cents for 1/2 kilogram. How much would 8 kilograms of ornages cost? Show all of your work. Make sure to incl
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Answer:

  $4.00

Step-by-step explanation:

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3 years ago
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4 years ago
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Solve the system of equations using the substitution method.
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Answer:

The classification of the set of circumstances is presented in the following subsections of the understanding.

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A 7-year health research project revealed that individuals for whom the mom took DES throughout pregnancy seem to have been twice as probable as women for whom the mothers didn't use the medication to establish tissue irregularities that could cause cancer.  

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(b)

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