# Posts by Ellie

Total # Posts: 345

**math**

-Write the arithmetic sequence 21,13,5,-3... in the standard form: a_n= -a_n=a_1+(n-1)d--so a_n=21+(n-1)-8 *a_n=-168-8n why isnt this right?

**math**

Determine the seating capacity of an auditorium with 10 rows of seats if there are 10 seats in the first row, 16 seats in the second row, 22 seats in the third row, 28 seats in the forth row, and so on ???

**social studies**

thanks so much i found the answer

**social studies**

p.s. i forgot to put remains in the oraginal question.

**social studies**

i mean why cant we find the remain off the Spanish missions left.

**social studies**

why we can't find many of the Spanish missions from this period in Florida?

**math please please!**

Is this correct? Write an explicit and recursive formula: -5,-4,-3,-2,-1... explicit: -5N+1 recursive:An-1+1

**math**

-2x^2<30 1/abs value(11-9x)=6 Please show me how to do these two!!

**Science**

Which moon would look the brightest from jupiter and why?

**Social Studies (France and nuclear arms)**

follow up question: what are some reasons that france have the right to nuclear arms? i know that in general it's for security and power but i don't know the specifics...... security, it's not like they have any threats right? and power.. im not sure what to say ...

**japan**

shukudai しゅくだい 宿題

**Social Studies (France and nuclear arms)**

what are some reasons that france have the right to nuclear arms? i know that in general it's for security and power but i don't know the specifics......

**Social Studies (France and nuclear arms)**

can anyone educate me about why france should have the right to nuclear arms?? and be specific about what the arms and rights are? please please please! i need to argue about it. thank you!

**science**

What is the unit for magnetic circuit?

**maths**

9 hours

**social studies**

Does apartheid still exist in some ways in South Africa? Explain.

**social studies**

What needs to take place to bridge the economic gap between whites and blacks in South Africa?

**science-urgent**

i still don't get how they're different. What are 4 differences between them?

**science-urgent**

What are differences between Continental Drifts and Plate Tectonics? I need at last 4 for each. Please help its urgent!!!!! Thanks a bunch! Ellie

**Math**

Ok we are doing distributive property in math and I'm so confused on some of the problems. the problems are: 9+(x-4) 5-4x-5/-4 4(3x-2y)-3(4x-3y) 7(r+s)-(r-s) 3y-2(x-2y) Thank you so much for your help. Ellie

**4th grade Math**

That means you have to multiply the numbers. The product is what you call the answer.

**Chem**

what product could you see in a flask when you cobined copper and sodium. basically what is the name for copper and sodium when combined

**Math**

What represants 5yards

**ecology**

Thanks!

**ecology**

Describe the abiotic conditions in a chaparral ecosystem? where is this ecosystem located? thanks!

**science**

How does a chemical beome neutral?

**science acids**

you were a big help thanks again

**science acids**

how come bile from your digestive system is acid [how does this occur ] ? thanks 4 the help

**French**

you are perfectly right

**Trig**

Find all x and y between 0 and 2pi so that the equation is ture -2 cosx -i sin y = 2 sinx +i i am also having trouble with this one Simplify the power of i i to the 39th power

**human life**

If you still don't know the answer just g.O.o.g.L.e it and you'll get it!Or ask in W (Y)ahoo! answers

**chemistry**

yh you are doing grt

**Science 8th grade**

it 's glucose

**Geometry**

11.312

**Math-measurement**

What is the official name of our system of measurement in America? All I ever hear about is the metric system, but I don't know what ours is called. Thanks

**acids and alkalis**

i.e 1-6 acid 7 neutral and numbers after that are alkalis

**acids and alkalis**

it becomes an acid due to which colour it turns when adding universal indicator

**maths**

How to calculate the mean number of threatened fishes, where total number of fishes is 29300 and number of threatened fishes is 1173. Hmmmm. you have one data point, that is, 1173 fish are threatened. The mean of one number is that number. Is there something else here? Thats ...

**math,algebra**

20% of $30 =30 * 1/5 = $6

**the big idea of energy**

if you know what the big idea of energy is please can you tell me?? i will tell you stuff about magnesium burning =] thanx xD

**More Physics**

The diagram below indicates three positions to which a woman travels. She starts at position A, travels 3.0 km to the west to point B, then 6.0 km to the north to point C. She then backtracks, and travels 2.0 km to the south to point D. a) What is the total displacement of the...

**Physics**

How do I do these? A passenger at an airport steps onto a moving sidewalk that is 100.0 m long and is moving at a speed of 1.5 m/s. The passenger then starts walking at a speed of 1.0 m/s in the same direction as the sidewalk is moving. What is the passenger's velocity ...

**James T. Russell**

I don't think so

**Don't understand this Geometry question**

Isosceles triangle XYZ is placed on a coordinate plane to be used for a coordinate proof. What should the coordinates of its vertices be? a. (-a,0), (0,0), (a,0) b. (0,0), (0,-a), (-a,0) c. (0,0), (0,a), (a,0) d. (0,0), (0,-a), (a,0) ??? 5 REASONS WHY SOCIAL STUDIES IS ...