Monday

December 29, 2014

December 29, 2014

Total # Posts: 2,377

**Honors Chemistry**

We did the gold penny lab, where we bathed a copper penny in a hot zinc-NaOH mixture to turn it a silver color, then we heated that in a flame to turn it a gold color. There are two questions that go with this lab that I don't understand, however: 4. Did the copper and ...
*October 7, 2009*

**math**

The distributive property means you DISTRIBUTE a number/variable to other numbers in a set of parentheses. So, in this example, you would distribute a to b, c, and d to get this: a => b a => c a => d ab + ac + ad
*October 6, 2009*

**Math Analysis (similar to my previous question)**

Thanks for all your help on both problems!! :)
*October 6, 2009*

**Math Analysis (similar to my previous question)**

How would you set this one up as well? 5. You have up to $30,000 to invest. Your broker recommends investing in AAA bonds yielding 8% and B+ bonds yielding 12%. You decide to invest at most $12,000 in the B+-rated bond and at least $6,000 in the AAA bond. The amount invested ...
*October 6, 2009*

**Math Analysis**

3.Each day the average toddler needs to consume 900 to 1700 calories. At most 30% of a toddler's total calories should come from fat. Describe the number of fat calories and total calories for the diet. Is a toddler following a healthy diet if s/he consumes 1200 calories a...
*October 5, 2009*

**Grade 7 Math**

I do not know how to figure out the pattern, but when you do you can justify your answer by saying multiplying all the numbers together is exactly the problem "99!" which you can punch in to a calculator. I hope this is right and makes sense :/
*October 5, 2009*

**12th grade chemistry**

h2o means water haha
*October 4, 2009*

**spanish **

what does this mean? que les gusta hacer a ustedes los sabados y domingo? what does that mean?
*October 1, 2009*

**8 grade math**

how can you express a number in expanded form and in scientific notation?
*September 30, 2009*

**4th grade**

In a fifth grade class of 16 students, one-half of the students arrived at school early,one-fourth arrived on time, and one-eight arrived late. On that day how many were absent? Solve using comparison bars.
*September 30, 2009*

**8th grade math**

how can you use prime factorization to determine the LCM and GCF of two numbers?
*September 30, 2009*

**Chemistry**

Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate 7.85g Ca(C2H3O2)2 (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine 0.254 M KI (c) Moles of solute in 145.6 L of 0.850 M sodium cyanide 124 mol NaCN
*September 29, 2009*

**Chemistry**

You did... I only posted one question today, which was earlier
*September 29, 2009*

**Chemistry**

I need help working the problems, I dont know how I got the right answers Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine (c) Moles of solute in 145....
*September 29, 2009*

**Chemistry**

Thank you so much
*September 28, 2009*

**Chemistry**

I know I just posted that question, I got answer from someone but they didnt show me how to work the problem, so I wasnt asking if you could show me how.
*September 28, 2009*

**Chemistry**

I need help working the problems, I dont know how I got the right answers Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine (c) Moles of solute in 145....
*September 28, 2009*

**Honors Chemistry**

Thanks so much!!!! :D
*September 28, 2009*

**Chemistry**

Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate 7.85g Ca(C2H3O2)2 (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine 0.254 M KI (c) Moles of solute in 145.6 L of 0.850 M sodium cyanide 124 mol NaCN
*September 28, 2009*

**algebra**

You're welcome! :)
*September 24, 2009*

**algebra**

Isolate the variable x onto one side of the equation: 6-2x = 6x-10x+14 -2x = 6x-10x+8 (subtract 6 from both sides) -2x = -4x+8 (add 6x and -10x) 2x = 8 (add 4x to both sides) x = 4 (divide each side by 2)
*September 24, 2009*

**Algebra**

I got 1 / x^2, or x^-2.
*September 24, 2009*

**algebra 3**

Zeros are also "x = ..." statements, so x = -2 + i, x = -2 - i, etc... Since you need REAL coefficients in the polynomial, change the x = -2 + i and x = -2 - i statements to "clean" polynomials, like this: x = -2 + i x + 2 = i (square each side to get rid ...
*September 24, 2009*

**math**

That's correct. Here's the check: -(-16)/2 + 4 = 12 16/2 + 4 = 12 8 + 4 = 12 12 = 12
*September 24, 2009*

**Literature**

Look on the definition for the word "audacity" on the Merriam Webster website. An example they give is "Her worst audacities did not seem to surprise him. - Edith Wharton".
*September 24, 2009*

**math**

You're welcome :)
*September 24, 2009*

**math**

All you have to do here is isolate the variable x on one side of the equation. Soooo start with substraction, like this: Ax + Hy = L Ax = L - Hy Now, to get rid of the coefficient A to isolate just the variable x, you have to divide both sides by A. (since A is technically ...
*September 24, 2009*

**math**

Search for "multiplication using box method" without quotes online and there's a good site by The Centre for Innovation in Mathematics Teaching.
*September 24, 2009*

**Honors Chemistry**

In my vocabulary crossword puzzle, I have one clue answer left to fill in the puzzle, but the clue doesn't match anything that even EXISTS: 9. A group 18 element (on the periodic table) Answer so far: N??E?????S NONE of the group 18 elements fit in here, though. And I ...
*September 24, 2009*

**math**

I just substituted in numbers from 0-9 to see what the answer was. "3AA1 is divisible by 9" means that the problem 3AA1 divided by 9 will equal an integral number. So, once you substitute in numbers you'll find that 3,771 divided by 9 equals 419, so A = 7. Hope ...
*September 24, 2009*

**Algebra**

-5/6b=-|-20| How do I solve for b? Thank you!
*September 24, 2009*

**Honors Chemistry**

Yes, the answer you gave me for the first one was exactly what I needed -- sorry I didn't make it clear enough as to what I needed :( lol. I totally understand both explanations! Thanks!! :D
*September 22, 2009*

**Honors Chemistry**

I'm doing what's called "test repair" for my class where we correct the answers we got wrong on the test. In order to get points back, however, we have to explain WHY that answer is the correct one. Can someone help me with these? 39. Nuclear forces exist ...
*September 22, 2009*

**math anaylsis**

oh okay :)
*September 22, 2009*

**math anaylsis**

x(132-3x) is the same exact thing as 132x-3x^2. x(132-3x) represents the area of the two pens together, with the length being 132-3x and the width being x.
*September 22, 2009*

**math anaylsis**

I just asked this same exact question yesterday, maybe we're in the same class! lol THIS IS WHAT I WROTE + REPLIES: "A rectangular pasture is subdivided into two equal pens. Using the barn as one side and 132 m of fencing for the rest, find the value of x that gives ...
*September 22, 2009*

**Precalculus**

Ohhhh I totally get it now!!! Thanks! :D
*September 22, 2009*

**Precalculus**

"A rectangular pasture is subdivided into two equal pens. Using the barn as one side and 132 m of fencing for the rest, find the value of x that gives the maximum area, and A(x)." It gives no diagram whatsoever, so I have no idea if all the sides are the same length ...
*September 22, 2009*

**Honors Chemistry**

Oh I see. Like ordering the energy levels of the elements, right? Like elements with red flames have a lower energy level than an element with a violet colored flame..
*September 20, 2009*

**Honors Chemistry**

We did a lab in class on Friday where we stuck a metal loop in various chemicals and stuck it in the flame of a Bunsen burner and we observed the flame's colors as the different metals went in. For every lab we do, we have to write a writeup which involves a graph. How ...
*September 20, 2009*

**science**

I think it's Melvin Calvin :)
*September 20, 2009*

**Precalculus**

Ohhhh duh!! I can't believe I totally overlooked that. Thanks Reiny!! :D
*September 20, 2009*

**Precalculus**

"Show that x^6 - 7x^3 - 8 = 0 has a quadratic form. Then find the two real roots and the four imaginary roots of this equation." I used synthetic division to get the real roots 2 and -1, but I can't figure out how to get the imaginary roots. I checked HotMath but...
*September 20, 2009*

**MATH 157**

Use the midpoint formula: x coordinate: (1st_x + 1st_y)/2 y coordinate: (2nd_x + 2nd_y)/2 So you could put it into an equation like this: 2 = (0 + x)/2 (for the x coordinate) -8 = (0+ y)/2 (for the y coordinate) I know it may have seemed confusing how I wrote it out, so please...
*September 20, 2009*

**AP English 11**

Ohhhhh I totally get it!! Thanks SraJMcGin and Ms. Sue! :D
*September 17, 2009*

**AP English 11**

Tomorrow in class, we have to write an essay about the play "The Crucible". This was the prompt our teacher gave us: "How was the play true? 1)when it was written 2)about when it happened 3)today as it is read" Does ANYONE understand this prompt and what it...
*September 17, 2009*

**Precalculus**

I'm HOPING this is the last problem I need help on.. :-/ List the possible rational zeros of f using the rational zero theorem. f(x) = 2x^3 - x^2 + 5x + 6 I applied the rational zero theorem, but none of the factors worked :(
*September 17, 2009*

**Precalculus**

Ohhh I see. Thanks so much!! :D
*September 17, 2009*

**Precalculus**

"An aquarium with length x, width x-10, and height x-5 holds about 750 cubic feet of water. Find all real solutions of the equation (I wrote it) 750 = x(x-10)(x-5)." I got the volume equation correct, right? I've tried dividing the factors of -750 by the factors ...
*September 17, 2009*

**Precalculus (algebra review)**

Omg. I feel like an idiot *bangs head against wall*. Soooo it would be (3x-2)(9x²+2x+4)?
*September 16, 2009*

**Precalculus (algebra review)**

grrr i mean [2/3]x in the middle of the second equation
*September 16, 2009*

**Precalculus (algebra review)**

Never mind, I think I just got it xD is this what it looks like factored out? (x - 2/3)(x^2 + [2/3] + 12)
*September 16, 2009*

**Precalculus (algebra review)**

My mind is coming to a blank as to how to factor out this polynomial: 27x^3 - 8 Any help is greatly appreciated!! :D
*September 16, 2009*

**Pre-Algebra**

1. 33 2. -26 3. 40 4. -69 5. -16 6. 12 7. -82 8. 33 9. 72 10. -43 11. 99 12. -73 13. 76 14. 181 TADA!
*September 15, 2009*

**Algebra**

13 is 76
*September 15, 2009*

**Algebra**

WHAT IS 13!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*September 15, 2009*

**Pre-Algebra**

I am awesome!!!!
*September 15, 2009*

**Geometry**

Find the value of the variable and VW if V is between U and W. UV=2,VW= 3x, UW=29 UV = r, VW = 6r, UW =42 UV = 4p - 3, VW = 5p, UW =15 UV = 3c+29, VW = -2c-4, UW = -4c Need a site to explain how to do these. Teacher not clear on explaining.
*September 15, 2009*

**Precalculus**

Never mind, I figured it out xD
*September 15, 2009*

**Precalculus**

"If 2 is a zero of a polynomial function f(x), name a factor of f(x)." Any help is greatly appreciated! :D
*September 15, 2009*

**Precalculus**

For our homework we had to read this one section which demonstrated the location principle (just in case this has a different name, I'll post it here:) "If P(x) is a polynomial with real coefficients and a and b are real numbers such that P(a) and P(b) have opposite ...
*September 14, 2009*

**9th grade**

what is an interior deserts
*September 14, 2009*

**Precalculus**

Ohhhhhh i totally get it now! Thanks!! :D
*September 14, 2009*

**Precalculus**

I usually know how to do these types of problems, but the second variable just threw me off balance.. 47. A rancher has 200 feet of fencing to enclose two adjacent rectangular corrals. What dimensions will produce a maximum enclosed area? (the diagram is of two adjacent ...
*September 14, 2009*

**home economics**

what is churned food turned into a thick liquid?
*September 13, 2009*

**7th grade history**

Why is history important to be studied? Include 3 events in history as supporting evidence. How are these events relevant today?
*September 13, 2009*

**US History**

Why is history important to be studied? Include 3 events in history as supporting evidence. How are these events relevant today?
*September 13, 2009*

**Math**

Would an estimate for the product of 34 and 56 be greater or less then the exact answer
*September 13, 2009*

**Wild Life Biology**

I don't know what you'd name it, but mothers generally defend their young if something they think is dangerous comes by. I think you could call that instinctive, anyway :)
*September 12, 2009*

**Math **

You're very close. However, you solved the equation like this: a^2 + b^2 = c 5^2 + 2^2 = c 25 + 4 = c 29 = c I think you forgot to mess with c^2: a^2 + b^2 = c^2 a^2 + 2^2 = 29^2 a^2 + 4 = 841 (once you subtract 4 from 841, you must take the square root of both sides) a^2...
*September 12, 2009*

**Math **

You solve for a using a^2 + b^2 = c^2 because it is the unknown value. I'm not exactly sure if that was what you were asking..
*September 12, 2009*

**MATH**

Does c=29? If so, use the Pythagorean Theorem and solve for a. a^2 + b^2 = c^2 a^2 + 2^2 = 29^2 a^2 + 4 = 841 ...
*September 12, 2009*

**algebra**

It gives you the value of x, so substitute that value into the first equation, like this: x + 3y = 2 x = 9 - 3y 9 - 3y + 3y = 2 9 = 2 Somehow, you get 9 = 2, which is DEFINITELY not correct, so maybe there was a typo in typing out the question?
*September 12, 2009*

**algebra**

All of the denominators in the equation have a common factor 4, so multiply both sides of the equation by that. 4( 5/2x + 1/4x = 5/4 + x ) 10x + x = 5 + 4x Bring the variables to one side of the equation and all the constants to the other side and solve for x.
*September 12, 2009*

**algebra**

-0.6x < -12 Divide both sides by -0.6. Because you are dividing by a negative number, you must flip the equality sign. x > 20 I hope you are actually looking to get HELP from these answers, not just copying the answers....
*September 10, 2009*

**algebra**

The coordinate (-4,5) is an (x,y) coordinate -- so, x = -4 and y = 5. Plug x and y into the equation 4x + 8y = 1 4(-4) + 8(5) = 11? -16 + 40 = 11? 24 = 11? 24 does not equal 11, so the coordinate (-4,5) is not a solution of the equation.
*September 10, 2009*

**Chemistry conversions check**

Oh okay thank you very much! :D
*September 10, 2009*

**Chemistry conversions check**

I'm sooooooo not sure if I'm doing this right, but can someone check it please? Thanks :)) 5) Determine the mass in grams of 3.01 x 10^23 atoms of Cl (element) I got 17.5 grams...is this right?
*September 10, 2009*

**english**

what was the plot for the book twisted?
*September 7, 2009*

**algebra 1**

Area = L * W Perimeter = 2L + 2W W = L - 80 So, plug in the width formula into the perimeter equation, which would look like this: 640 = 2L + 2(L-80) 640 = 2L + 2L - 160 640 = 4L - 160 800 = 4L L = 200 It looks like you don't even need the information about the area of the...
*September 3, 2009*

**Precalculus**

Yeah it confuses me too :( thanks for your help though, I appreciate it! :D
*September 3, 2009*

**Precalculus**

I know i isn't considered a real coefficient, but when you multiply it out shouldn't there be an ix as you're working it out?
*September 3, 2009*

**Precalculus**

Write the simplest polynomial equation with real coefficients having roots -i and 4. I have noooooo idea how to even start this one :( I thought you could start backwards with synthetic substitution but it didn't work. Any help on this is greatly appreciated!! :D
*September 3, 2009*

**Precalculus**

I'm sorry I'm posting so many questions, I promise this is the last one tonight :) The leading coefficient of a cubic polynomial P is 2, and the coefficient of the linear term is -5. If P(0)=7 and P(2)=21, find P(3). I DO NOT understand how to even start this one. I ...
*September 1, 2009*

**Precalculus**

Whoops, I meant we had to find the value of the function K(x^2), not where K(x)=x^2. Sorry about that lol
*September 1, 2009*

**Precalculus**

K(x) = x^2(x^2 + 16), where K(x) = x^2. I got K(x^2) = x^8 + 16x^4. Is this right? Thanks :))
*September 1, 2009*

**science**

The formula for density is p = m/v, where p is density, m is mass, and v is volume. First, you would figure out the volume by: V = 3 cm * 3 cm * 3 cm V = 27 cubic centimeters Plug everything that you know into the formula: p = 27g / 27cm^3 p = ? g/cm^3 Hope this helps! :)
*September 1, 2009*

**Reading**

Check out Sparknotes, Cliffsnotes, PinkMonkey, etc. to see if any of the summaries answer your question. Hopes this helps!
*September 1, 2009*

**Precalculus problems check?**

Thank you!! :D
*September 1, 2009*

**Precalculus problems check?**

Sorry the last "anonymous" was me. xD
*September 1, 2009*

**Precalculus problems check?**

By the way, in the first problem in the parentheses it's supposed to be like "one minus the square root of 2". Sorry if that wasn't clear :-/
*September 1, 2009*

**Precalculus problems check?**

Did I do these two problems right? P(1-sqrt2) = 8x - 4x^2 P(1-sqrt2)= -4 P(2/x)= 8x - 4x^2 P(2/x) = x-1 I think when the answers are plugged back in, the equation is supposed to equal zero, but I don't get this; however, I always redo each problem with different methods ...
*September 1, 2009*

**ACCOUNTING CONFUSED!! HELP**

Andy Wright,D.D.S., opened a dental practice on January 1, 2008. During the first month of operations the following transactions occurred. 1. Performed services for patients who had dental plan insurance. At January 31, $875 of such services was earned but not yet recorded. 2...
*September 1, 2009*

**U.S. History**

Thank you! :)
*August 28, 2009*

**U.S. History**

Why didn't Britain just raise taxes in England during the French - Indian War?
*August 28, 2009*

**Macroeconomics**

Why is the tax multiplier smaller than the government spending multiplier?
*August 25, 2009*

**Macroeconomics**

Why is the real investment multiplier smaller for local communities then for the nation?
*August 25, 2009*

**math**

Oh DUH that's what place value is. Maybe it's time I go back to school!
*August 17, 2009*

**math**

I don't think I know what place value is, but it sounds like there is enough books I guess. It depends on how many books is required for each student, which is not given here.
*August 17, 2009*

**MATH**

that makes no sense at all because (1) you have ten TIMES as much flour so why would you divide and (2) 1.1 is not anywhere close to being in between 40 and 50
*August 17, 2009*

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