Friday
April 25, 2014

Posts by Emily


Total # Posts: 2,269

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....

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.

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.

Chemistry
Thank you so much

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.

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....

Honors Chemistry
Thanks so much!!!! :D

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

algebra
You're welcome! :)

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)

Algebra
I got 1 / x^2, or x^-2.

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 o...

math
That's correct. Here's the check: -(-16)/2 + 4 = 12 16/2 + 4 = 12 8 + 4 = 12 12 = 12

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".

math
You're welcome :)

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 mul...

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

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 trip...

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 t...

Algebra
-5/6b=-|-20| How do I solve for b? Thank you!

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

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 bec...

math anaylsis
oh okay :)

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.

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 t...

Precalculus
Ohhhh I totally get it now!!! Thanks! :D

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 ...

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..

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 cou...

science
I think it's Melvin Calvin :)

Precalculus
Ohhhh duh!! I can't believe I totally overlooked that. Thanks Reiny!! :D

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...

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...

AP English 11
Ohhhhh I totally get it!! Thanks SraJMcGin and Ms. Sue! :D

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...

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 :(

Precalculus
Ohhh I see. Thanks so much!! :D

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 ...

Precalculus (algebra review)
Omg. I feel like an idiot *bangs head against wall*. Soooo it would be (3x-2)(9x²+2x+4)?

Precalculus (algebra review)
grrr i mean [2/3]x in the middle of the second equation

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)

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

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!

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!

Algebra
13 is 76

Algebra
WHAT IS 13!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Algebra
I am awesome!!!!

Pre-Algebra
I am awesome!!!!

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.

Precalculus
Never mind, I figured it out xD

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

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 s...

9th grade
what is an interior deserts

Precalculus
Ohhhhhh i totally get it now! Thanks!! :D

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 corral...

home economics
what is churned food turned into a thick liquid?

7th grade history
Why is history important to be studied? Include 3 events in history as supporting evidence. How are these events relevant today?

US History
Why is history important to be studied? Include 3 events in history as supporting evidence. How are these events relevant today?

Math
Would an estimate for the product of 34 and 56 be greater or less then the exact answer

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 :)

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 ...

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..

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 ...

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?

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.

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....

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.

Chemistry conversions check
Oh okay thank you very much! :D

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?

english
what was the plot for the book twisted?

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...

Precalculus
Yeah it confuses me too :( thanks for your help though, I appreciate it! :D

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?

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

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 th...

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

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 :))

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! :)

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

Precalculus problems check?
Thank you!! :D

Precalculus problems check?
Sorry the last "anonymous" was me. xD

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 :-/

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 an...

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....

U.S. History
Thank you! :)

U.S. History
Why didn't Britain just raise taxes in England during the French - Indian War?

Macroeconomics
Why is the tax multiplier smaller than the government spending multiplier?

Macroeconomics
Why is the real investment multiplier smaller for local communities then for the nation?

math
Oh DUH that's what place value is. Maybe it's time I go back to school!

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.

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

MATH
A baker needs between 40 and 50 pounds of a flour-sugar mixture that contains ten times as much flour as sugar. What are the possible weights of flour the baker can use? Would I set it up like: 40+10x<x<50+10x

CHEMISTRY
What do you think happens to mass when chages take place?

ALGEBRA 2
Mrs. Smith drove at a rate of 45 mi/h from her home to her sister's house. She spent 1.5 hours having lunch with her sister. She then drove back home at a rate of 55 mi/h. The entire trip, including lunch, took 4 hours. How far does Mrs. Smith live from her sister? I set i...

ALGEBRA 2
thanks. i had that but instead of subtracting i was adding for some reason.

ALGEBRA 2
A plane takes off from an aiport and flies east at a speed of 350 mi/h. Ten minutes later, a second plane takes off from the same airport and flies east at a higher altitude at a speed of 400 mi/h. How long does it take the second plane to overtake the first plane? I have trie...

math
Okay great thank you so much that makes much more sense!

math
I have no idea where to start! *A quick quiz consists of 3 multiple choice problems, each of which has 4 answers, only one of which is correct. If you make random guesses on all 3 problems, (a) What is the probability that all 3 of your answers are incorrect? (b) What is the p...

AP English
Thank you! :)

AP English
I have to read the Grapes of Wrath and find 24 quotes to analyze. Some of the quotes have to be biblical allusions (from even-numbered chapters), and the others have to be a rhetoric device. I'm almost done with the book, but I've only found maybe 13 quotes. Even our t...

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