# Posts by Amber

Total # Posts: 1,672

**math**

Identify the solution(s) of the system of equations, if any. 2x+5y=10, y=2-x

*December 7, 2013*

**Algebra**

Remove the parentheses from the following expression, and combine like terms: 3(ax + b2 – c) + 2 22 A. –3(ax – b2 + 3c – 6 B. 3ax +3b2 – 3c + 2 C. 3(ax + 3b2 – 3c + 6 D. (ax + b2 – c + 5

*November 15, 2013*

**physics**

a 36 kg child slides down a slide at a height of 2.5 m at at velocity of 3 m/s. how much energy was transferred by friction as she slid down the slide?

*November 12, 2013*

**Earth Science**

THANKS !

*November 5, 2013*

**Earth Science**

do you think that the earthquake that affected japan should have a impact on the nuclear issues for the united states ? DONT UNDERSTAND THIS QUESTION AT ALL !

*November 5, 2013*

**Chemistry**

never mind I figured it out!! hydrogen peroxide, so it breaks down to water and O2 and seeing the bubbles proves that the actual reaction occurred

*October 29, 2013*

**Chemistry**

what is important about oxygen being formed during a titration?? (formed in container after it has been titrated not in the burette)

*October 29, 2013*

**Geometry**

Find the measure of angle DBC. D=X^2+1 A=2x+3x-2 C=4x+3 This is the only question I do not know for my homework ,I just don't understand it. PLEASEE Explain Step By Step .

*October 27, 2013*

**meterology**

Saturated (cloudy) air at a temperature of 20 °C (68 °F) has a relative humidity of _________%

*October 23, 2013*

**Physics**

A police radar has an effective range of 1.0 km, and a motorist's radar detector has a range of 1.9 km. The motorist is going 100km/h in a 80km/h zone when the radar detector beeps. At what rate must the motorist decelerate to avoid a speeding ticket?

*September 6, 2013*

**Health**

Is it "c"??

*August 22, 2013*

**Business English**

Investors and their wives" is considered sexist because:

*August 12, 2013*

**pllzzz**

i rlly need this question answered cuz i have to get these problems done i don't mean to be pushy

*July 31, 2013*

**math**

A rectangle has a perimeter of 42 cm. One of its sides is 11 cm long. What are the demensions of the rectangle??

*July 31, 2013*

**chemistry 2**

Calculate the relative concentrations of o-ethylbenzoic acid (pKa 3.79) and potassium o-ethylbenzoate that are needed to prepare a pH 4.0 buffer I know to set up hassle equation but when i get .21=log[a-/ha] i get lost because i was not given concentrations .. please help ...

*July 28, 2013*

**Calculus Grade 12**

Find the equation of the plane that passes through the point (3,7,-1) and is perpendicular to the line of intersection of the planes x-y-2z+3=0 and 3x-2y+z+5=0

*June 10, 2013*

**economics**

explain how a us citizen whose income is in the top one percent would talk about scarcity

*May 30, 2013*

**economics**

explain how a us citizen whose income is in the top one percent would talk about scarcity

*May 30, 2013*

**Algebra**

The length of a rectangle is (x+2) inches. The width of the rectangle is (x+1) inches. Write an equation that can be used to determine the area (A) of the rectangle in terms of x. What is the value of x if the area of the rectangle is 56 square inches?

*May 16, 2013*

**Algebra**

Jan is a photographer. She earns $42.50 for each picture she sells. It costs Jan $850.00 per month to maintain her photography lab. Write an equation that represents the relationship between Jan's monthly profit (P) and the number of pictures (x) she sells. What does the x...

*May 16, 2013*

**Algebra**

The perimeter of a rectangular garden is 35 feet. The length of the garden is 1 foot more than 2 times its width. Write an equation to represent the perimeter of the garden in terms of its width (w). What are the length and width of the garden in feet?

*May 16, 2013*

**language**

I know there both authors :)

*May 12, 2013*

**L.A**

Anyone know anything?

*May 12, 2013*

**language**

I'm not sure because I need the answers to :) but if you find out anything let me know =)

*May 12, 2013*

**english**

1. Read the following stanza from “Alone”: Lying, thinking Last night How to find my soul a home Where water is not thirsty And bread loaf is not stone I came up with one thing And I don’t believe I’m wrong That nobody, But nobody Can make it out here alone...

*May 1, 2013*

**Math**

The area of a rectangular garden is 110 square meters. The width is 6 meters loner than one-half of the length. Find the length and the width using area=lengthxwidth

*April 30, 2013*

**English**

1. A. 2. B.

*April 28, 2013*

**English**

i think the first one is B. but i'm not really sure. 2. i think is A.

*April 28, 2013*

**English**

1.) We hung makeshift curtains in our room using (1point) A. Bed sheets. B. Old Curtains. C. New Curtains. 2.) Which of the sentences below is punctuated correctly? A. I opened the door and my cat ran outside. B. I opened the door, and my cat ran outside. C. I opened the door...

*April 28, 2013*

**chemistry**

interpret the following balanced equation into Particles, Moles, Mass: 2Al+3CuSO4== AL2(SO4)3+ 3Cu

*April 24, 2013*

**physics**

The period of the musical node E0 is 4.85 × 10-2 seconds. What is the frequency of this note?

*April 19, 2013*

**english**

should religious phares be taken out of money for a reasearch paper

*April 14, 2013*

**physics**

What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is .90

*April 10, 2013*

**Math**

If you deposit P dollars into a bank account paying an annual interest rate r, with n interest payments each year, the amount A you would have after t years is A=P(1+r/n)^nt. Kevin places $100 in a savings account earning 6% annual interest, compound quarterly. If Kevin adds ...

*April 1, 2013*

**calculus**

Find a formula for the fourth degree polynomial p(x) whose graph is symmetric about the y-axis, and which has a y-intercept of 4, and global maxima at (1,6) and(-1,6).

*March 29, 2013*

**I would like to understand my calc homework:/**

I think the whole non panicing ship sailed a long time ago haha. Sorry and thanks for the help!

*March 27, 2013*

**I would like to understand my calc homework:/**

Consider the differential equation given by dy/dx=(xy)/(2) A) sketch a slope field (I already did this) B) let f be the function that satisfies the given fifferential equation for the tangent line to the curve y=f(x) through the point (1,1). Then use your tangent line equation...

*March 27, 2013*

**Ellipses**

Given an ellipse; 4x^2+y^2-48x-4y+48=0, find the Center, find the Major Axis, find the Minor Axis & the Distance from C to Foci?

*March 27, 2013*

**ellipses**

given an ellipse; 2x^2+6y^2+32x-48y+212=0, find center, major axis, minor axis & distance from c to foci?

*March 27, 2013*

**Ellipses**

Given an ellipse; 8x^2+y^2+80x-6y+193=0, find center, major axis, minor axis, & distance from c to foci?

*March 27, 2013*

**ellipses**

Given an ellipse; 3x^2+5y^2-12x-50y+62=0, find the Center, the Major Axis, the Minor Axis, & the distance from C to Foci?

*March 27, 2013*

**ellipses**

Given an ellipse; 3x^2+5y^2-12x-50y+62=0, find the Center, Major Axis, Minor Axis, & the distance from C to Foci?

*March 27, 2013*

**English**

I have to annotate some notes and I'm not sure what a couple of these terms mean, your help would be much appreciated! Unifying Effect Analytical Writing Thesis Statement

*March 26, 2013*

**math**

4/x=radical11-1/3

*March 26, 2013*

**probability**

in a 2-card hand, what is the probability of holding only face cards?

*March 25, 2013*

**Chemistry**

would i divide 0.111M by 2

*March 22, 2013*

**Chemistry**

Calculate the molarity of the nitrate ion in a 0.111 M solution of calcium nitrate? so would I have to find the number of moles of (NO3)2 and then divide it by the 0.111 M to get the molarity of the nitrate ion I am so confused please explain the set up I don't want the ...

*March 22, 2013*

**Biology**

I know Darwin went the Galapagos islands and he viewed the finches found there how their beaks were different sizes and shapes because of the seeds they ate but they were all the same species but their beaks changed because of natural selection.

*March 20, 2013*

**Math**

What is the perimeter of an equilateral triangle with an altitude of 15m?

*March 14, 2013*

**Calculus**

Is there anybody who can actually walk me through working out the problem please?

*March 11, 2013*

**Calculus**

Find an equation of the tangent line to the given curve at the specified point: y=sqrt(x)/x+1, (4,2/5)

*March 11, 2013*

**college general chemistry**

3Co(NO 3 ) 2 (aq) + 2Na 3 PO 4 (aq) &---> Co 3 (PO 4 ) 2 (s) + 6NaNO 3 (aq) how do I find the molar mass of precipitate.X hydrate

*March 10, 2013*

**Algebra 2**

Because of friction and air resistance, each swing of a pendulum is a little shorter than the previous one. The lengths of the swings form a geometric sequence. Suppose the first swing of the pendulum has an arc length of 100 cm and a return swing of 99 cm. a.)On which swing ...

*March 7, 2013*

**Physics**

A thundercloud has an electric charge of 43.2 C near the top of the cloud and -38.7 C near the bottom of the cloud. The magnitude of the electric force between these two charges is 3.95x10^6 N. What is the average separation between these charges? (kc=8.99×10^9 N • ...

*March 7, 2013*

**Math**

How high is a wall that casts a 10ft shadow @ the same time that a 6ft flag pole casts a 6ft shadow

*February 28, 2013*

**college general chemistry**

calculate the lowest whole number ratio of Moles of Mg/moles of O average of Moles of Mg/Moles of O Trial 1 mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229 Trail 2 mass of empty crucible and lid=32.221 mass of Mg=0.340 mass of ...

*February 25, 2013*

**college general chemistry**

calculate the lowest whole number ratio of Moles of Mg/moles of O mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229

*February 25, 2013*

**chemistry**

What is the limiting reagent for 6HCl + Fe2O3 = 2FeCl3 + 3H2O ? 6HCl has 18.44 moles and Fe2O3 has 2.91 moles. Also how many moles would FeCl3 produce?

*February 25, 2013*

**chemistry**

What is the limiting reagent for 6HCl + Fe2O3 = 2FeCl3 + 3H2O ? 6HCl has 18.44 moles and Fe2O3 has 2.91 moles. Also how many moles would FeCl3 produce?

*February 25, 2013*

**Spanish**

definite articles(el, la, los, las) must always agree with the noun. If it is masculine singular(el), if it is masculine plural(los), feminine singular(la), feminine plural(las). If you have a mixed group like your pasajeros above, then it would take a masculine plural ...

*February 15, 2013*

**Spanish**

1. Vengo de la taqueria 2. Venimos de la .... 3. Viene de la ..... 4. acabar de 5. acabas de estudiar 6. acaba de caminar por el parque 7. muchas vacas 8. muchos edificios grandes

*February 15, 2013*

**Bio**

In Drosophila, sepia colored eyes are due to a recessive allele s and wild type (red eye color) to its dominant allele s+. Sepia-eyed females are crossed to pure wild type males. What phenotypic and genotypic ratios are expected if the F1 males are then backcrossed to sepia-...

*February 13, 2013*

**math**

What are you trying to find the area???

*February 8, 2013*

**math**

Simplify the third root of 4 over the fifth root of 8

*February 8, 2013*

**Spanish please translate from spanish to english**

Prima in this context is referring to cousin(feminine). 1. Which is the older cousin? 2. Which is the younger cousin?

*February 8, 2013*

**Spanish**

5. c 6. d 7.d. 8. b. 9. a. 10. c

*February 4, 2013*

**Spanish**

1. B 2. Should be D. 3. C is correct 4. Should be A. It is asking what you(plural) do

*February 4, 2013*

**Alegebra I**

I need help please!!! On January 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of population growth. Its population increases 7% each year. On the same day, Checkersville had a population of 70,000 people. Checkersville starts to ...

*February 3, 2013*

**college general chemistry**

it's right thank you so much so i just need to learn my significant figures yeah

*February 2, 2013*

**college general chemistry**

I am so lost I imput 6.188 because it's online homework and it said my answer was wrong you don't have to convert because it has the spot where you put the answer then cm^3

*February 2, 2013*

**college general chemistry**

Devron that's not right it said incorrect

*February 2, 2013*

**college general chemistry**

Calculate the volume of a rectangular solid with a thickness of 0.750 cm and an area of 8.25 cm2

*February 2, 2013*

**chemistry**

the helium in a 1.5L flask at 25degrees celcius exerts a pressure of 56.65kPa. How many moles of helium are in the flask?

*January 30, 2013*

**French**

How do you say " I like to..."?

*January 23, 2013*

**reading**

go to Google search doctor operations and see if that helps if not you can also search cool plastic surgery facts.

*January 23, 2013*

**Calculus**

Instructions were evaluate the integral. (x/1-x^4) dx I know that this form is the tanh inverse 1/1-x^2 but not sure how to substitute and start this problem. Please Help.

*January 22, 2013*

**Calculus**

Instructions were evaluate the integral. (x/1-x^4) dx I know that this form is the tanh inverse 1/1-x^2 but not sure how to substitute and start this problem. Please Help.

*January 22, 2013*

**english**

are theses correct before i right them down

*January 19, 2013*

**Geometry**

DEFG is a rectangle. H is the intersection point of the two diagonals. DH= 3x – 3 and EG = x + 44. Find the value of x and the length of each diagonal.

*January 10, 2013*

**history**

Using the acronym M.A.I.N. ( militarism , alliances , imperialism , nationalism ) Describe how tension rose in Europe during the early 1900s ?

*January 9, 2013*

**Geometry**

the ration if the side lengths of two similar rectangles is 4:3. what is the ratio of the areas of the rectangles?

*January 9, 2013*

**Math**

7) Use Pascal's Triangle to find the coefficients for (a + b)5 . I need help with this?

*January 8, 2013*

**Probability and Statistics**

For question 1, here's the numbers you use: {20, 18, 17, 19, 22, 29, 16, 27, 24}. 1. Calculate the 50th percentile. For questions 2 and 3 use this number line: {16, 17, 18, 19, 20, 22, 24, 27, 29, 80} 2. Calculate the z-score for the 80 & explain what it means. (Explain ...

*January 4, 2013*

**AP CHEMISTRY**

What is the of a solution obtained by dissolving two extra-strength aspirin tablets, containing 594 of acetylsalicylic acid each, in 202 of water? The active ingredient in aspirin is acetylsalicylic acid , a monoprotic acid with Ka=3.3*10^-4 at 25 C. Can you provide the method...

*January 2, 2013*

**AP CHEMISTRY HELP**

Thank you so much. Also, would this same procedure be used for when there's an air bubble in the titration?

*December 20, 2012*

**AP CHEMISTRY HELP**

a) A student fails to wash the weighing paper when transferring the KHP sample into the beaker. What effect does this error have on the calculated molarity of the NAOH solution? Mathematically justify your answer. b) A student failed to notice an air bubble trapped in the tip ...

*December 20, 2012*

**Math**

Multiply. Write the answer in simplest form. 6×78=

*December 20, 2012*

**math**

explian in writing how waould you use a number line to round 148 to the nerst ten

*December 4, 2012*

**physics, please help!**

(a) Find the current in each resistor of the circuit shown in the figure byusing the rules for resistors in series and parallel. (b) Write three independent equations for the three currents using Kirchhoff’s laws: one with the node rule; a second using the loop rule ...

*November 28, 2012*

**precalculus**

Why can't you answer your own homework questions? You can't stroll through life being a cheater.

*November 27, 2012*

**Math Essentials**

How many ways can an IRS auditor select 4 of 9 tax returns for an audit?

*November 27, 2012*

**Chemistry**

True because I did learn that the lower the pH the more acidic it is.

*November 25, 2012*

**Chemistry**

The hydronium ion concentration in coffee is 1 x 10^-5 M. What is the pH of coffee?

*November 25, 2012*

**Chemistry**

The hydronium ion concentration for a solution is determined to be 4.5 x 10^-7 M. What is the concentration of the hydroxide ion? I just wanted to let the people that are being nice enough to help me know that this is for a study guide. It is not a test or quiz. :0) Thanks.

*November 25, 2012*

**chemistry**

I want to say because it has more of the reactant. Am I right?

*November 25, 2012*

**chemistry**

Write a balanced equation for the proton transfer reaction between water and phosphate ion. Determine in which direction the equilibrium is favored.

*November 25, 2012*

**Chemistry**

When a 5.00 ml sample of vinegar is titrated, 44.5 ml of 0.100 m NAOH solution is required to reach the end point. What i sthe concentration of vinegar in moles per liter of solution?

*November 25, 2012*

**Chemistry**

How much heat would be released by burning one gallon of octane? The density of octane is 0.703g/mL. 1 gallon= 3.79 liters.

*November 21, 2012*

**algebra**

Do the equations x = 4y + 1 and x = 4y – 1 have the same solution? Justify your answer with an explanation or a graph. How might you explain your answer to someone who has not learned algebra?

*November 20, 2012*

**english**

Select the gerund phrase in the sentence below. Then, determine the noun function of the gerund. 1. Water skiing, sailing, and swimming are my favorite summer sports. 2. I enjoy playing the piano.

*November 16, 2012*