Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 2,300

**Math Analysis**

Ohhhh that makes PERFECT sense! :D I'm soo glad I get this now. Thanks so much!! :)

**More help? :(**

Ohhhh I get it :) I have like two more questions though -- 3. f(-2x) ==> Would you multiply the x- and y- coordinates by -2? I'm soooo confused :-/ And for number 8, the graph is a parabola instead, with the vertex at (0,0), and the "arms" of the parabola goin...

**Math Analysis**

Given f(x) as shown, graph the following: [the line is going through (-2,-3) and (2,0)] 1. f(x) + 2 ==> My graph I have is a line going through the points (-2,-1) and (2,2). Is this correct? 2. 2f(x) ==> Can someone help me with this one please? I thought the 2 in front ...

**8th grade**

To make the trip there and back home, it's 77 miles x 2, so total Lori is going to have to drive 154 miles. To find out how many gallons she'll need, divide 154 miles by 28 mpg. Soooo she'll need 5.5 gallons EXACTLY to make the roundtrip.

**Honors Chemistry**

Thank you soooooo much for all your help!!!! The worksheet you hyperlinked to was EXACTLY what I needed. Thanks again! :D :D

**Honors Chemistry**

Can someone please explain to me how to use the stock naming system when naming chemical/ionic compounds? I reeeeaaaally do not get it. Here's some examples: 1. CaCO3 ==> I know the answer is calcium carbonate, but how is it that answer? 2. FeSO4 ==> The answer is fe...

**english**

When outlining the theme of a short story in a single paragraph, what should it include? And how long should the paragraph be?

**Math Analysis**

Tell if the function is symmetric with respect to the x-axis, y-axis, and origin. 3. 8x^2 - 2y^2 = 12 ==> I got that it was symmetric to both the x- and y-axes. Is this right? 4. 5x^2 - 3y^2 = 18 ==> I can't get anywhere with this equation -- I'm getting the answ...

**writing**

Bernard Evslin's Ulysses? I haven't really over come cunning enemies.

**writing**

I'm writing an essay about the character Ulysses. I need to make a personal connection with him, though I'm not sure how?

**Math Analysis**

Ohhh that makes perfect sense! I don't see how I couldn't see that before. Soooo the answer would be g(h(f(x))), right? Thanks for your help!! :D :D

**Math Analysis**

Let f(x)= x^3, g(x) = sqrt x, h(x) = x-4, and j(x)= 2x. Express the following function k as a composite of three of these four functions. k(x)= sqrt (x^3 - 4) Do I need to factor anything out of the parentheses or something? If you can, please explain this problem to me :) any...

**arithmetic**

0.22 divided by 7.02

**writing skills**

It is letter A, because the chairman is DOING the telling, which is active voice. In letter D, the chairman is being ACTED UPON by the verb "told", which is passive voice. Does this make sense?

**Honors Chemistry**

Can someone check my work please? Thanks :)) 2. Write the formulas for the compounds formed between the following: g. Cu+2 and NO3- (the +2 and - are superscripts, while the 3 is a subscript) ===> I got Cu(NO3)2. h. NH4 and SO4(2-) (the two 4's are subscripts, and the (...

**Math Analysis**

4. Find f(x) + g(x) when f(x) = x^(1/2) and g(x) = 6x^(1/2). ===> I got the square root of 7x. Is this right? 16. Find f(x)/g(x) when f(x) = (2x)^(1/2) and g(x) = 2*(sqrt2)*x^(1/3). ===> I got (sqrt2x) / (3*cubertx), but I definitely don't think this is right....if i...

**12th grade Economics**

The chapter states that the elderly population in the U.S. is growing more rapidly than the total population. In particular, the number of the total workers is rising slowly, while the number of retirees is rising quickly. Concerned about the future of Social Security, some me...

**Honors Chemistry**

Ohhhh, I get it now. Thank you so much!! :D

**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 zin...

**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

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

Thanks for all your help on both problems!! :)

**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 i...

**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...

**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 :/

**12th grade chemistry**

h2o means water haha

**spanish **

what does this mean? que les gusta hacer a ustedes los sabados y domingo? what does that mean?

**8 grade math**

how can you express a number in expanded form and in scientific notation?

**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.

**8th grade math**

how can you use prime factorization to determine the LCM and GCF of two numbers?

**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

**Chemistry**

You did... I only posted one question today, which was earlier

**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?

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