Step-by-step explanation:
Let "c" be the original number of classrooms.
The 1200/c was the original number of students per classroom.
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Equation:
1200/(c-4) = (1200/c)+10
Multiply thru by c(c-4)
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1200c = 1200(c-4)+10c(c-4)
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1200c = 1200c-4800 + 10c^2-40c
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10c^2-40c-4800 = 0
c^2-4c-480 = 0
Factor:
(c-24)(c+20) = 0
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Positive solution:
c = 24 (# of classrooms originaly planned)
Rate of change is Rise over run=3/36=1/12 inches
1. 567
2. 33
3. 85%; $17
4. they have 4 pages left
5. (-5,2)
The triangle is 3x10/2 = 15 ft.
The rectangle is 5x10 = 50 ft.
Total = 65 ft.
Answer: ET
Step-by-step explanation:
