A school organized a trip for its students, the travel cost 1200DZD (Algerian dinars) for all of the students, at the last moment 4 students joined the trip so the price went down by 10DZD for each student.
How many students marked themselves (paid) before the 4 others joined.
Please help and thank you.
Mathematics exercice help
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A school organized a trip for its students, the travel cost 1200DZD (Algerian dinars) for all of the students, at the last moment 4 students joined the trip so the price went down by 10DZD for each student.
How many students marked themselves (paid) before the 4 others joined.
Please help and thank you.
How many students marked themselves (paid) before the 4 others joined.
Please help and thank you.
1200/x=1200/(x+4)+10
1200x+4800=1200x+10x(x+4)
10x^2+40x-4800=0
x^2+4x-480=0
(x+24)(x-20)=0
Since only positive answers matter x=20 is the only solution
1200/x=1200/(x+4)+10
1200x+4800=1200x+10x(x+4)
10x^2+40x-4800=0
x^2+4x-480=0
(x+24)(x-20)=0
Since only positive answers matter x=20 is the only solution
1200x+4800=1200x+10x(x+4)
10x^2+40x-4800=0
x^2+4x-480=0
(x+24)(x-20)=0
Since only positive answers matter x=20 is the only solution
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