The students of litchfield High school are in grades 9,10,11,12. Of the students , 1/4th are in 9th grade, 1/3rd are in 10th grade, 1/6th is in 11th grade and there are 300 in the 12th grade, how many students are there all together?

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1. Assistance needed.

Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.

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2. Let AT be all together.

1/4 AT+ 1/3 AT + 1/6 AT + 300=AT
3/12 AT + 4/12 AT + 2/12 AT+300=AT
9/12 AT +300=AT
solve for AT

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3. need help on hspa

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4. 398

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5. Calculate the
volume of CO2
produced at STP from
the decomposition of
20 g calcium
carbonate caco3?

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6. A researcher is collecting qualitative data pertaining to social behaviors of deer at different times of the day. How will she most likely need to organize this data?

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all together 1200 students

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8. 1200

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9. 4x-12/4x

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10. i want to answer this inequality of graph f(x)= x-3 if x >= 3

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11. English is a language of opportunity.why bother to teach other language, because it doesn't help bt English does

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12. 9th = 1/4
10th = 1/3
11th = 1/6
1/4 + 1/3 + 1/6= 1/4+2/6+1/6
=1/4 + 3/6
=1/4 + 1/2 =3/4
300= 25% or 1/4
3/4= 3* 300= 900

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13. Nine actors audition for four different parts in a play.
In how many ways can the director fill these roles?

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14. how many moles of hcl will be produced

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15. let total no of students=T
so in 9th class= T/4
in 10th class=T/3
in 11th class=T/6
so in 12th class=T-[(T/4)+(T/3)+(T/6)]
= T/4
and is given that, students in 12th class= 300
so total students in school= 300*4=1200

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16. Help meh plz with this...

Find the second derivative of the polynomial.
f(x)=14x2
Write your answer as a polynomial in x or as a constant. Simplify any fractions.
f′′(x)=

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