Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 824

**math**

Let F1=(-6,0) ,F2=(6,0) A=(10,0)64 + and B=(-10,0) write an equation of the set of all points p(x,y) such that (PF1/pluse /PF2/=20. now i know the problem is the square root of (x+6)^2 +y^2 + the square root of (x - 6)^2 + y^2 = 20 and the anserew is x^2/100 + y^2/64=1. i am t...

**science**

what is the following answers for the definitions i dont understand; control, repetition, validity, reliability, accuracy, controlled variable, independent and dependent variable, hypothesis? We'll be happy to help you understand these definitions if you post the dictionar...

**eth 125**

the official language movement, pp.24-244 of the text by researching biligualism in education and politics in the U.S. Find four to six credible web sites or articles that support, opporse, more present information about biligualism in education of polictics

**Calculus**

I am confused on how to solve this problem : $5000 is invested for 4 years at 7% per annum compound interest. a. what will the amount be at the end of this period? b. what is the expression for the value of the investment after n full years? c. the investment will exceed $10,0...

**Economics**

Utilizing market demand and market supply curves for spaghetti, help me illustrate the effect on equilibrium price and quantity of spaghetti for: Increased worldwide demand for rice leads to an increase in the price of ride (which many see as an alt to spaghetti in preparing m...

**Economics**

Utilizing market demand and market supply curves for spaghetti, help me illustrate the effect on equilibrium price and quantity of spaghetti for: Increased worldwide demand for rice leads to an increase in the price of ride (which many see as an alt to spaghetti in preparing m...

**AP Chem**

I missed a lab in class a week ago and had to make it up just the other day. My teacher didn't have time to explain the lab to me, so he gave me a brief overview of the procedure. The objective of the lab was to calculate the specific heat of an unknown block of metal. The...

**egypt mummification**

im doing a cross word and book of the dead and pyramid text dont fit what should i do

**pre-calc**

Solve: cos(2x-180) - sin(x-90)=0 my work: cos2xcos180 + sin2xsin180= sinxcos90 - sin90cosx -cos2x - sin2x= cosx -cos^2x + sin^2x -2sinxcosx=cosx I'm stuck here. I tried subtracting cosx from both sides and making sin^2x into 1- cos^2x, but I still can't seem to solve t...

**Pre-Calc**

How do I solve this? My work has led me to a dead end. tan(45-x) + cot(45-x) =4 my work: (tan45 - tanx)/(1+ tan45tanx) + (cot45 - cotx)/(1 + cot45cotx) = 4 (1-tanx)/(1+tanx) + (1-cotx)/(1+cotx) = 4 Then I found a common denominator, giving me this: (2-2cotxtanx)/(1+cotx+tanx+c...

**Chem**

Does my work here look right? 3. One mole of an ideal gas expands adiabatically into a vacuum. Calculate q, delta-e, w, and delta-H for the process. q= 0 [adiabatic] w= -Pext(V2-V1) w= 0 delta-e = w + q delta-e = 0 + 0 = 0 delta-h= delta-e + P(delta V) delta-h= 0 + 0 = 0 does ...

**Chem/Physics**

1. How much work is necessary to accelerate a bullet having a mass of 5.0 g to a velocity of 1000. m/sec? This was on a chemistry problem set of mine, and it seems like a very physics-oriented question [I have not taken physics.] Could someone point me in the right direction a...

**Chem**

A few classmates and I were arguing about a problem we had to do for homework. The problem states: Limestone, CaCO3, when subjected to a temperature of 900 degrees C in a kiln, decomposes to calcium oxide and carbon dioxide . How much heat is evolved/absorbed when one gram of ...

**8th grade algebra**

ten over eight = what over ten????? please help me!!!!!!!!!! 10 / 8 = x / 10 This means that 8 * x = 10 * 10 Solve for x.

**cHEMISTRY**

Strontium metal is responsible for the red color in fireworks. Fireworks manufacturers use strontium carbonate, which can be produced by combining strontium metal, graphite (C), and oxygen gas. The formation of one mole of SrCO3 releases 1.220 x 10^3 kJ of energy. a) Write the...

**Maths**

3x + 1 < -2 subtract one from each side, then divide both sides by three. first you need to look at each side of what ever your looking at and subtract 1 from each number then divide the numbers by 3 I have trouble with math all the time. so I was wondering if you could hel...

**math**

suppose that the gas tank of a car holds 12 gallons and that the car uses 1/ 20 of a gallon per mile .let x be the nuber of miles the car has gone since the tank was filled? (1/20x)= 12 so now get x by itslef! (1/20x)/ (1/20)= 12/(1/20) x= 240! yeah I am good! that is good! go...

**math**

suppose that the gas tank of a car holds 12 gallons and that the car uses 1/ 20 of a gallon per mile .let x be the nuber of miles the car has gone since the tank was filled? (1/20x)= 12 so now get x by itslef! (1/20x)/ (1/20)= 12/(1/20) x= 240! yeah I am good! that is good! go...

**math**

97x+1/4=4 okay well minus 4 from 1/4 wich gives you?? 97x= 15/4 now get x by itself by dividing 97 by 15/4 wow! 1). Subtract 1/4 from both sides 97x+1/4-1/4=4-1/4 97x=31/4 (3.75) 2). Devide both sides by 97 97x/97=3.75/97 <-or 3.75 devided by 97 x=?

**math**

97x+14=4 First, subtract 14 from both sides. Then, let us know if you get stuck.

**math**

gasoline consumption problem suppose that the gas tank of a car holds 12 gallons and that the car uses 1/ 20 of a gallon per mile .let x be the nuber of miles the car has gone since the tank was filled? car holds 12 gallons 1/20 gallon/mile 12*20 = 240 miles possible what is t...

**word unscramble**

daes sldrp

**KEYBOARDING**

The main difference between block letter style and modified block letter style is/are the

**Philosophy**

G > (J > O) ~ ~ M v V ~ O * ~ ~ J ~ V > K / ~ G ~ (K * M) / V (L * A) > Z W v S ~(~ L * T) S > ~ (P > V) A / S = ~ W / Z v T Rules of replacment- DeMorgans Rule**

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