Saturday

April 19, 2014

April 19, 2014

Total # Posts: 1,682

**math**

I Don't know, it was our teacher who typed the questions.

**math**

Given the formula X=x to the power of 2 + y to the power of 2 can you find X if x=9,y=negative 4,z=1/2?

**Calc**

Find the constant of proportionality for the following situation: "y is jointly proportional to x and z and inversely proportional to w." w=2, x=5, y=4, and z=9 So i think the equation is y=xz/w But what is the constant of proportionalit supposed to mean?

**Math**

A person can have 1 of 4 blood types: A, B, AB, or O. A Student determined that the probability that a randomly selected person has blood type O. What is wrong with his reasoning?

**Microeconomics**

yes

**science**

How many hydrogen atoms are in a molecule of C8H10N4O2? wouldnt it just be 10?

**Science **

How many hydrogen atoms are in a molecule of C8H10N4O2? wouldnt it just be 10?

**math**

One day we decided to drive from Town A to Town D. In order to get there we had to drive through Town B and then Town C. It is 10 miles farther from Town A to Town B than it is from Town B to C. IT is 10 miles farther from Town B to Town C than it is from Town C to Town D. It ...

**English**

Oh alright, should I ask someone specific or just keep checking back?

**English**

Alright thank you. I was wondering does the title of the book have to be underlined or in quotes and is the following a good way to start my essay? America is in the Heart is a classic autobiography that truly exhibits the struggle of immigrants that ventured to the United Sta...

**English**

Hi, I have to write a short reaction paper (2 pages) about the book America is in the Hearth by Carlos Bulosan. I have to discuss an important theme and provide examples. I was thinking about comparing his life in the Philippines and his life in America. Even though he had hig...

**chem (science)**

Which of the following pairs of elements are likely to form ionic compounds: A) helium and oxygen B) magnesium and chlorine C) chlorine and bromine D) potassium and sulfur E) sodium and potassium F) nitrogen and oxygen I believe the answer is d and f Would appreciate a verific...

**science**

Which of the following pairs of elements are likely to form ionic compounds: A) helium and oxygen B) magnesium and chlorine C) chlorine and bromine D) potassium and sulfur E) sodium and potassium F) nitrogen and oxygen I believe the answer is d and f

**algebra**

For all positive integers x, let x▲ be defined to be (x-1)(x+1). Which of the following is equal to 6▲ - 5▲ ? Does this mean I'm supposed to multiply the 6 and the 5 to (x^2-1) and subtract them from each other?

**chemistry**

A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. Explain the chemical process that occurred in hi...

**chem**

A block of metal has a width of 3.2cm, a length of 17.1cm, and height of 3.6 cm. Its mass is 1.3 kg. Calculate the density of the metal.

**chem**

The speed of light is 3.00 times 10^8~m/s. How fast is this in miles per hour (miles/h)? Use the conversion 1{mile} = 1610{m}.

**chem**

The speed of light is \rm 3.00\times 10^8~m/s. How fast is this in miles per hour (\rm miles/h)? Use the conversion 1 \;{\rm mile} = 1610\; {\rm m}.

**PreCal**

Alison, Could would you tell me if the problem listed below is correct: (4+5i)(4-5i)= 16+-i

**PreCal**

Write the expression (7 – 7i) + (–8 – 2i) in the form a + bi

**literature**

a villnelle is?

**Statistics - Probability**

Yes you definitely do need 1-0.93. Psydag, you are correct!

**college chemistry**

thank DrBob!! Your the best!! :)

**college chemistry**

Why is iodine important to biological tissues such as the thyroid gland? Give a prediction for why iodine is added to the table salt supply. ** I have no idea! :(

** Math**

i dont know how to solve this, i'm so lost. determine the exact value of c cot( 4c- pie/4) + tan ( 2c + pie/4)= 0 please help me!!! THANK YIU

**Chemistry / Elements**

if fluoride is considered toxic, then why do they put it in tooth paste and municipal drinking water supplies?

**calculus**

actually, as i was taught that using 1/3 as a decimal should just be .3 too & i see what tonya did! haha .8x comes from the addition of .3x+.5x. simple addition...

**american history**

d is the answer

**science**

Sarah needs to replace part of the metal railing on her deck and wants the new railing to match the existing railing. However, she does not know what metal the railing is made from. Which is a property that she can use to identify the metal?

**grammar**

i am having a hard time figuring out the adverbs and adjectives in my paragraph, can anyone help me with this? A few years ago, I had filled out an application for a credit card from capital one. I was accetped and given a spending limit of 300 dollars. I maxed out that limit ...

**Chemistry**

how would I make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution?

**Greek**

The Greek base which means to burn is Cla- Path- Sat- Cau(s)-

**Calculus AB**

That makes me feel so much better. It must have been an error on the teacher's part then. Thank you very much.

**Calculus AB**

The limit as x approaches infinity of (1+1/x)^x. I tried this twice and I got an answer of e both times, but the answer that my teacher read off in class was not e. Please help.

**algebra**

a cardboard box which has a volume of 60 cubic inches and has the dimensions of (x-1) (x-6) (x-2) what is the lenght, width and height of the box

**For**

What are the 3 base languages in Europe? I know there's Slavic, Romance which is Italian and French, but I can't remember the last one. Help!

**Math**

The moon has a surface area of approximately 14,650,000 mi squared. Estimate its radius to the nearest mile.

**math**

Simplify 5(y + 1)

**chemistry**

Identify the acid/conjugate base and base/conjugate acid pairs for the following reactions H2CO3(aq) + H2O(l) <===> H3O+(aq) + HCO3 -(aq) C5H5N(aq) + H2O(l) <===> C5H5NH+(aq) + OH-(aq

**Chemistry**

# Electron Pairs # Lone Pairs Electronic Geometry Molecular Geometry Lewis Structure Sketch of Shape I need to do the above things for SBr6 and BrCl5. If anybody can help that would be great!

**algebra**

Minimum Wage: The table shows minmum wage for three different years Year 1940 1968 1997 Wage ($) 0.25 1.60 5.15 (a) Make a scatterplot of the data in the viewing rectangle [1930, 2010, 10] by [0, 6, 1] (b) Find a quadratic function given by f(x) = a(x – h )^2 + k that mod...

**Chemistry**

Construct the data chart and the pH curve for the titration of 25 mL of 0.1 M CH3COOH with 0.1M NaOH. Add the titrant 1 mL at a time and calculate the pH after each addition

**chemistry**

balance the redox equations: IO3-(aq) -> I2(aq) and I-(aq) -> I2(aq) balance the redox equation: S2O3(-2) -> S4O2(2-) and I3- -> I-

**Science**

Both gases will have approximately the same density at these conditions. When the volume is held constant, raising the temperature will increase the density of both samples.

**Calculus AB (AP)**

Hi, I have a calculus test tomorrow and I understand how to complete all of the problems, but I am unsure behind the reasoning of taking two derivatives. Can someone please explain the following: 1. g(x)=e^(f(x)) g'(x)=e^(f(x))f'(x) 2. f(x)=Integral from 0 to 3x of the...

**chemistry**

ferric hydroxide is insoluble same with manganese hydroxide

**chemistry**

the reaction with ammonium hydroxide with the following metals: Fe3+ Mn2+

**chemistry**

what is the reaction with sodium hydroxide for the following metals: Al3+ Fe3+ Mn2+ Ni2+ Zn2+

**Math**

how would I make a tslly table for the number of students in th third, fourth, and fifth-grade classes: 26, 25, 27, 27, 26,28,27

**math**

please answer i need it by next class...

**math**

A line segment has an endpoint at (3,2). If the midpoint of the line segment is (6.-2), what are the coordinates of the point at the other end of the line segment?

**Math **

Can a golden rectangle have a shorter base than height? I'm not sure how to answer this can you please help :)

**Chemistry**

I can't figure out how to solve this problem: The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the amount of sold NaF that is required to prepare a 250. mL acidic buffer with pH = 2.75. The initial molarity of hydroflouric acid is .250M but you have only 75mL....

**Chemistry**

The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the amount of sold NaF that is required toprepare a 250. mL acidic buffer with pH = 2.75. The inital molarity of hydroflouric acid is .250M but you have only 75mL.

**Speech Class**

Thank you mam :)

**Speech Class**

yeh so i think its true :)

**Speech Class**

True or False, Communication can involve language but not speech.

**english **

Yay, I am so excited!! Thank you Did I leave any out?

**english **

Opening and professional are advectives

**english **

played their (first) game the (first) team besides season in a (new) ballpark have a (long) standing rivalry Are these corerct and are there still others?

**english **

I have found opening and professional. I keep redoing my paragraph to make it easier to find them but it is not working for me.

**english **

Could you please help me locate the adjectives and adverbs in the below paragraph? St. Louis is most often considered to be Cardinals Nation. The greatest day in St. Louis is opening day of baseball. The St. Louis Cardinals are a professional baseball team in St. Louis, Missou...

**English**

Here is my new paragraph that I revised. Please help me with the adjectives and adverbs. I have a learning disorder and get very upset when I can not figure things out. Thanks St. Louis is most often considered to be Cardinals Nation. The greatest day in St. Louis is opening d...

**English**

opening is before day in the first sentence. Some is in the 3rd to last sentence. Do you know how many adjectives there are in the paragraph?

**English**

I think the adjectives are opening central national major some Please let me know if I am correct.

**English**

Can you give me a hint on the number of adjectives you see?

**English**

I seen the help you gave other people and was wondering if you could help me idenify 5 adjectives and adverbs in my paragraph. St. Louis is considered to be Cardinals Nation. The St. Louis Cardinals are a professional baseball team based in St. Louis, Missouri. They were found...

**math**

what does 4/5 of 25 mean?I don't get that

**math**

Input:4 and 6 Output:12 and 17 What's the rule

**Chemistry**

What is the freezing point of a solution of 1.17g of 1-naphthol, C10H8O, dissolved in 2.00ml of benzene at 20 degrees C? The density of benzene at 20 degrees C is 876g/ml. Kf for benzene is 5.12 degrees C/m, and benzene's normal freezing point is 5.53 degrees C.

**Physics**

An object with mass 0.250 kg is acted on by an elastic restoring force with force constant 10.8 N/m. The object is set into oscillation with an initial potential energy of 0.150 J and an initial kinetic energy of 6.00×10−2 J. What is the amplitude of oscillation? W...

**math**

5 yards= 180 in So 5 yards is greater

**Algebra**

use FOIL (2x^5-6)(x^6-3) My answer is -10x^22-18...but I am not sure that is right. Could someone please help.

**computer/internet**

LTE vs 3G and HSPA?

**Litracy**

HELP!!! I don't remember how to make a dam sonnet with 10 syllables?

**Math**

Hi do the following sets have the same cardinality, why or why not? N= 1,2,3,4,5,6,7... N-2= blank, blank, 3,4,5,6,7... So basically the numbers from 3 to 7 match up in both sets, but in N-2 the first two are empty. I think they have the same cardinality but I don't know h...

**Chemistry**

moles*

**Chemistry**

how do you figure out the moled without its molecular mass

**separation of variables**

solve the value problem by separation of variables dy/dx=x^2/y when y=-5 and x=3

**separation of variables**

is the answer to find an equation of the curve that satisfies dy/dx=4x^3y and whose y-intercept is 7 y=7e^(x^4)

**Chemistry**

I do not know how to get the products from the left half of the equation. After that I am pretty much fine, except for I don't know how to determine the charge of certain compounds.

**Chemistry**

Write a balanced chemical equation (molecular equation). Write a total ionic equation. write a net ionic equation. (NH4)2 SO4(aq)+Na2CO3(aq) -->

**Hot-air balloon**

A hot-air balloon is 180 ft above the ground when a motorcycle passes directly beneath it (travelling in a straight line on a horizontal road) going at a constant speed of 60 ft/s. If the balloon is rising vertically at a rate of 15 ft/s, what is the rate of change of the dist...

**maths**

thank you

**maths**

what is the circumference the radius the arc the chord the diameter

**Calculus **

A hot-air balloon is 180 ft above the ground when a motorcycle passes directly beneath it (travelling in a straight line on a horizontal road) going at a constant speed of 60 ft/s. If the balloon is rising vertically at a rate of 15 ft/s, what is the rate of change of the dist...

**Social**

Key difference/s between the 1929 Crash and previous stockmarket crashes was/were A) The impact of the investor's pools B) That many middle income people were stockholders C) All of the choices D) The government's intervention I think it's all of the choices, but I...

**math**

matt used centimeter cubes to make a solid that had a volume of 5 cubic centimeters and a surface area of 22 square centimeters. what might his solid looked like?

**math**

3/4 x 5/7, but that means you presume you took out a blue marble the first time. How do you know that you didn't take out a red marble, so you still have all six blue marbles when you pick the second time?

**math**

If there are 6 blue marbles and 2 red marbles in a bag, what is the probability of picking a blue marble then another blue marble if you do not replace the first marble P(B,B)? 3/4 x 5/7 or is it 3/4 x 6/7?

**Math**

x/(x^2-16)-6/(x^2+5x+4)

**geometry**

Circle O above has a circumference of 240 cm and arc XW has a length of 60 cm. What is the measure of the central angle associated with arc XW?

**Economics**

As the aggregate price level falls, the number of domestic products purchased by foreigners will [rise], causing the quantity of domestic output demanded to [rise]. This is known as the [foreign purchases effect]. The first two blanks can be rise,fall or stay the same. and the...

**Chemistry**

If 15.0ml of a 6.0M HCl solution is diluted to 75.00ml, what is the molarity of the diluted solution?

**Physics **

For the reaction: C4H10 + O2 ¨ CO2 + H2O ( is this balanced?) , how many moles of CO2 is formed when 5.00 moles C4H10 reacts with O2? A. 5.00 B. 1.25 C. 20.0

**chemistery**

suppose that "element a" has a valence number of 3 and "element b" has a valence number of 2. if the two elements combine, then when writing the formula for the resulting compound what subscript number will be given to "element b"?

**Chemistry**

If i titrated 25.0mL of 0.500M HCl with 0.500M NaOH and then 25.0mL of 0.500M of an unknown weak acid HA with 0.500M NaOH. How would the two titration curves compare at 10 or 15mL of NaOH Beyond equivelance pts? I think that they will be the ssame or similar but i don't kn...

**Chemistry**

I don't know how to get the mole ratios of the following: Copper to Chloride Zinc to Chloride Zinc to Copper There are the moles I have of each; Copper 4.25*10^-3 mol Zinc 3.67*10^-3 mol Chloride 2.27*10^-2 mol

**Chemistry (Stoichiometry)**

a) Mg + 2H2O ==> Mg(OH)2 + H2

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