Saturday

April 18, 2015

April 18, 2015

Total # Posts: 643

**Algebra**

Hi. 1. I have a right triangle here. I know that I am to use the Pythagorean Theorem: a^2 + b^2 = c^2. In this case, side a is (x + 4) and b is x. The hypotenuse is 4 + (x + 4) So here we have the equation: (x + 4)^2 + x^2 = 4 + (x + 4)^2. I need to find the length of a (the ...
*March 11, 2014*

**Algebra**

You say that I can't use a^2 + b^2 = c^2, but that formula is called the Pythagorean theorem. I was instructed to use that formula. Am I misunderstanding what you're saying?
*March 11, 2014*

**Algebra**

For #1: When I get √(9y - 196) = -7 can I square each side to get 9y - 196 = 49? Then I can add 196 to both sides. It cancels out on the left side and I have 9y = 245. Then I can divide both sides by 9. I would get y = 27.2. Would that be correct?
*March 11, 2014*

**Algebra**

I have a couple questions about # 1. Why can't it be a^2 + B^2 = c^2? I think that's what I'm taught in class. Also, if you square everything, isn't still going to come out the same? If you do something to the entire expression, it doesn't change the value...
*March 11, 2014*

**Algebra**

1. √(9y - 196) + √196 = √49 My work: I squared all 3 roots and got 9y - 196 + 196 = 49 The - 196 + 196 cancels out and we are left with 9y = 49. divide 49 by 9. = 49/9. I'm pretty sure this is wrong. Can you show me where I messed up? 2. √x(√9...
*March 11, 2014*

**Algebra**

Well, I entered in the calculator √28 + √63 + √175 and got 6.06. I just entered the expression. I didn't take the sq roots first.
*March 11, 2014*

**Algebra**

I have a question. #3: On my calculator, √28 + √63 + √175 = 6.06, but 10√7 = 26.5. Shouldn't they = the same number? As for #5.. I'm not really sure, tbh. I tried that problem a while a go and I'm not quite sure where I was going with it.
*March 11, 2014*

**Algebra**

Simplify the expressions and solve the equations 1. 2√3 - √12 My answer: 2√3 - 2√3 = 0 2. √(5p + 5)^2 = √(6p + )^2 I got the answer p = 4 3. √(28) + √(63) + √(175) This one seems so simple. I tried multiple times, but I can...
*March 11, 2014*

**Algebra**

Okay, I have a graph of a sq root function. I'm told to write the radical function for f(x). Some points on the line are (1,-2) and (5,0). I know you probably can't help me a whole lot, but if you can give me any insight into how to figure this problem out, I'd ...
*March 11, 2014*

**Algebra**

Y values: -2, -1, 0, 1. Right? I'm not sure why I had so much trouble with this. I think I was making a minor mistake in my calculations that set everything off. Thanks for your help.
*March 11, 2014*

**Algebra**

Okay. Thank you. :)
*March 11, 2014*

**Algebra**

Complete the table for each function. 1. f(x) = √x The x values are 0, 1,4 and 9. The corresponding y values that I got are 0, 1, 2 and 3. 2. g(x) = -1/4√ x The x values are 0, 1, 4, and 9. The corresponding y values that I got are 0, -1/4, -1/2 and -3/4 3. h(x...
*March 11, 2014*

**Inverse laplace**

Given F(s) = 1/((s-1)^(2)(s+1)) After using partial fractions, I got (1/4)[(2/((s-1)^(2)))+(1/(s+1))-(1/(s-1))] before applying Laplace inverse. Apparently, the answer is (1/4)[2te^(t) + e^(-t) - e^(t)], however I don't know where the t in 2te^(t) came from. Can someone ...
*March 6, 2014*

**Polynomial**

Arrange the terms of the polynomial in descending powers of p. 13rp-4r^4p^4-4r^2p^3 Is my answer correct? -4r^4p^4-4r^2p^3-13rp
*March 2, 2014*

**Algebra**

That is the wrong answer
*March 2, 2014*

**Algebra**

Arrange the terms of the polynomial in ascending powers of b. 25db^5-7dm+3b^10-6db^6 My answer is: Am I correct? 25b^5d-7dm+3b^10-6b^6d=3b^10-6b^6d+25b^5d-7dm
*March 2, 2014*

**Intermediate Algebra**

Given f(x)=5+6x-x^2 find and simplify. A)f(t-2)=____? B)f(z+h)-f(z)=____? C)f(b)+3=_____?
*March 2, 2014*

**Algebra**

Arrange the terms of the polynomial in descending powers of p. 13rp-4r^4p^4-4r^2p^3
*March 2, 2014*

**Algebra**

Given f(x)=5+6x-x^2 find and simplify. A)f(t-2)=____? B)f(z+h)-f(z)=____? C)f(b)+3=_____?
*March 2, 2014*

**Algebra**

I have a word problem here. A batter hits a fly ball. A scout in the stands makes the following observations. Time (in secs) .75, 1.5, 2, 2.75, 3.25, and 4.75 Height (in feet) 77, 133, 160, 187, 194, and 169 1.What type of function best models this data? Linear, Exponential, ...
*February 28, 2014*

**Algebra**

1. Parent Quadratic Equation 2. Coordinate of the vertex 3. quadratic formula A. -b/2a B. y = 2x C.b^2 - 4ac D. y = a(x - h)^2 + k E. x = -b +/- (square root of) b^2 -4ac/2a I think the answers are: 1. B 2. C 3. E Are these correct? Thanks!
*February 28, 2014*

**Algebra**

Thank you. Also thanks for correcting the "whether" VS. "weather" mistake. I always have trouble with that. :)
*February 28, 2014*

**Algebra**

Hiya! I have a function here: y = x^2 - 4x - 32 I have some questions about it. 1. I think this parabola opens up. Am I correct? Can you explain how you know weather it opens up or down? 2. Can you tell me what the axis of symmetry and the vertex of this parabola are? 3. Can ...
*February 28, 2014*

**Algebra**

Thank you!
*February 26, 2014*

**Algebra**

I have a graph here. The vertex is (4,-4), then the points (3,-3) and (5,-3), then the points on the x axis are (2,0) and (6,0), then the points (1,5) and (5,5). This is a parabola that opens up. I'm asked to write a function for f(x) in standard form. I'm a little ...
*February 26, 2014*

**Algebra**

Will you please check my work? I'm supposed to "Use square roots to solve the following equations; round to the nearest hundredth, if necessary." 1. 5x^2 - 526 = -651 My Work: 5x^2 - 526 + 526 = -651 + 526 (sq root of) 5x^2 = (sq root of) -125 = 5x/5 = 11....
*February 26, 2014*

**Algebra**

I wrote the first problem incorrectly. It's supposed to be 5x^2 - 526 = -651 I apologize.
*February 26, 2014*

**Algebra**

Will you please check my work? I'm supposed to "Use square roots to solve the following equations; round to the nearest hundredth, if necessary." 1. 5x^2 - 256 = -651 My Work: 5x^2 - 526 + 526 = -651 + 526 (sq root of) 5x^2 = (sq root of) -125 = 5x/5 = 11....
*February 26, 2014*

**Algebra**

My problem was that I didn't understand that they wanted me to plot the positive AND the negative x values (hence why they labeled them +/-)to form the parabola. Thank you for your help!
*February 25, 2014*

**Algebra**

Okay, so I'm asked to "Complete the table for each function". 1. f(x) = x^2 x = 0, +/-1, +/-2, +/-3 y = 0, 1, 4, 9 So, I plugged each of the x values into the equation and got the y values that are shown above? Are those correct, or did I do something wrong? We ...
*February 25, 2014*

**English**

A. Do you know what you want to become when you grow up?
*February 25, 2014*

**APA Format**

How should I input a sub-heading in APA format? For example: Community Core (centered/bold) Demographics of community (left aligned/indented/not bold)
*February 22, 2014*

**Intermediate Algebra**

(Thank you for all your help on this site) A basketball team recently scored a total of 95 points on a combination of 2-point field goals, 3-point field goals, and 1-point foul shots. Altogether, the team made 54 baskets and 16 more 2-pointers than foul shots. How many shots ...
*February 20, 2014*

**Algebra**

I got 405, 210, and 163.
*February 20, 2014*

**Algebra**

In the United States, the highest incidence of fraternal twin births occurs among Asian-Americans, then African-Americans, then Caucasians. Of every 16200 births, the total number of fraternal twin births for all three is 778, where there are 195 more for Asian-Americans than ...
*February 20, 2014*

**Algebra**

In triangle ABC, the measure of angle B is 8 degrees more than three times the measure of angle A. The measure of angle C is 37 degrees more than the measure of angle A. Find the measure of each angle. What is the measure of angle A__? What is the measure of angle B__? What is...
*February 18, 2014*

**10th grade Science**

Explain how a drug sits on acetylcholine receptors will affect muscle function? Is it because the drug would act as a blocking agent to prevent the receptors from gathering information on what to do?
*February 8, 2014*

**Anatomy and Physiology**

Explain how a drug that sits on acetylcholine receptors will affect muscle function? Is there a good source online to find the above question? My book doesn't go into great detail for me to answer the question.
*February 7, 2014*

**2nd Order linear ODEs**

I'm having trouble solving this problem: For the equation x^(2)y′′ - xy′ = 0 , find two solutions, show that they are linearly independent and find the general solution. Hint: Try y = x^(r). I divided the equation by x^(2) first to simplify it, and then I...
*January 30, 2014*

**10th grade Science**

Explain, physiologically, how you would decide to use ice or heat on an injury? My book doesn't have any good info on this question. Is there a reputable website or article to get info to answer this question?
*January 24, 2014*

**Python: Creating function**

The value of the inventory of a particular book is the price of that book times the number of copies we have in stock. Write a function called inventory_value that takes a Book as its argument and returns the value of our inventory of that book. Then write a function called ...
*January 24, 2014*

**Python: Named tuples**

Nevermind, figured it out! :D
*January 23, 2014*

**Python: Named tuples**

I've been trying to print a list of the book titles within the named tuple in alphabetical order, but I don't know what I'm doing wrong. I've set up my named tuple as so: Book = namedtuple('Book', 'author title genre year price instock') # Book ...
*January 23, 2014*

**Integrating Factors**

I see, thanks!
*January 20, 2014*

**Integrating Factors**

I've been working on this hw problem for a while now, but I'm stuck in the integration process. I'm pretty sure I made an error, cause I can't seem to be able to integrate the right side of the equation. Q: (1/(x^(2)+1))y' + xy = 3 using the equation d/dx(...
*January 20, 2014*

**Math: Differential Equations**

Woops, wrong problem. The problem I need help is actually: Q: Is it possible to solve the equation y'=(xy)/(cosx) for y(0)=1? Sorry about that!
*January 15, 2014*

**Math: Differential Equations**

I've been stuck on this math hw problem for a while, I was thinking of taking the integral of the equation, but I've been messing up too much that I'm not sure anymore. Q: Is it possible to solve y'=x/(x^(2)-1) for y(1) = 0? Thank you!
*January 15, 2014*

**Math: Differential Equations**

I'm given y''= sin(x) with the initial conditions of y(0)=0 and y'(0)=2. I've already taken the integral two times to get an answer of y= -sin(x)+3x, however, I'm stuck as to how to make this equation in terms of x=... Please explain, I'd really ...
*January 14, 2014*

**English-Urgent please!**

Okay, thanks for the quick response!
*December 21, 2013*

**English-Urgent please!**

I mean the phrase rule sentence=Noun phrase, aux, verb phrase That is the phrase structural rule. I understand what you wrote but I can't connect it with what am trying to figure out. Can you please explain?
*December 21, 2013*

**English-Urgent please!**

I think I got it. The simple sentence phrase rule is used to combine compound sentences. Is this correct?
*December 21, 2013*

**English-Urgent please!**

What phrase structure rule creates coordinate structures? I am confused here. Is it prepositional phrases?
*December 21, 2013*

**English**

If com and pos can be separated just like able and ity, shouldn't I separate them now? I know com is a prefix but I didn't know pos is a root.
*December 21, 2013*

**English**

What is entailment in semantics? List three words (not necessarily related to each other) that evidence entailment and say what meanings each word entails. Can you explain the 3 words part of this question. Three random words?
*December 21, 2013*

**English**

I got: non, de, compose, able, ity. Is that correct?
*December 21, 2013*

**English**

nondecomposability? How many morphemes are in that word. I have five-non,de,ability,com,ity what about the pos?
*December 21, 2013*

**Physics**

Nevermind, I figured it out!
*December 7, 2013*

**Physics**

I've been trying to solve this problem for the longest time, but I still can't get the answer. The answer is apparently 36 degrees below the horizontal. Please explain!! (: A missile is launched from the ground with a speed of 100 m/s at an angle of 45 degrees to the ...
*December 7, 2013*

**Linguistics/English**

I also need help with figuring how to draw certain things like the 'of' and 'on' in the first sentence.
*November 22, 2013*

**Linguistics/English**

Hi, I need more help. I need to know if I diagrammed these sentences correctly. Edith drew some orange flowers on the side of the house. Edith......Flowers (drew,some,orange).......(On)......Side (the)...(Of)....House (the) Final:Noun, Noun, (preposition), Noun, (preposition...
*November 22, 2013*

**Linguistics/English**

Is there any difference? I don't know if its a trick question or if I really have two questions that are the same.
*November 21, 2013*

**Linguistics/English**

Girl (the, young), sent/wrote, Note (a, short), preposition, Mother (her)
*November 21, 2013*

**Linguistics/English**

There are two sentences that vary only by one word difference. Sentences: The young girl wrote a short note to her mother. The young girl sent a short note to her mother. My Answer: Girl sent/wrote Note ---to Mother -the -a -her -young -short The structure is:Noun, verb, noun...
*November 21, 2013*

**Linguistics/English**

I have an assignment about sentence diagramming. I need help. Any example given will be great.
*November 21, 2013*

**Biology**

single celled prokaryotes like the bacteria and archaea are the dominant and most diversified groups of living forms today. does this support their ancient origins? Explain
*October 20, 2013*

**Chemistry**

Hey guys! are you from 3.091x ? I wasn't aware that there was a exam, and now it is due in few hours. Can you help me out? Much appreciated. 1)Determine the minimum potential that must be applied to a proton so that, on interaction with a hydrogen atom, it can excite the ...
*October 12, 2013*

**CHEMISTRY**

1. For the ion Fe3+ what is the electron configuration and electron atrangement? please explain... i do not understand... 2. F- +. Br2----> Br- + Cl2----->
*September 27, 2013*

**Math**

How do you draw 56 degrees 10 minutes and 26 seconds on paper? protractor ? circle? clock? any website that helps this type of construction? the minutes and seconds threw me off....
*September 26, 2013*

**Math**

The least squares regression line is a unique line for each data set. True The least squares regression line minimizes the sum of the residuals. False
*September 19, 2013*

**ALGEBRA **

-32x^5y^4-24x^4y-16x^3y= _ _ _ _ Factor out: -8x^3y
*September 17, 2013*

**ALGEBRA **

-32x^5y^4-24x^4y-16x^3y= _ _ _ _ Factor out: -8x^3y
*September 17, 2013*

**Poetry/British Literature/12th grade **

Which of the following poems is a dramatic monologue? (A) "My Last Duchess" (B) "Love Among the Ruins" (C) Childe Roland to the Dark Tower Came (D) all of these
*August 27, 2013*

**College Algebra**

what is the equivalent logarithmic form of 6^z=244
*June 26, 2013*

**algebra**

I have no idea totally lost haven't done any type of math in almost 30 years f(x)= x^4-x^3-7x^2+x+6 all the real roots are bounded by -3 and 4. Explain why these are the upper and lower bounds
*June 24, 2013*

**algebra**

how do I find the relative maximum and minimum values of x^4-x^3-7x^2+x+6
*June 24, 2013*

**algebra**

solve x^4-8x^3+64x-105=0 given that 2-i is one solution. must be tired cause my steps are not calculating correctly
*June 24, 2013*

**math/algebra**

find the domain of the function 1) f(x)= log2( 49-x^2) 2) f(x)=In [1/x+5]
*June 23, 2013*

**math/algebra**

solve the equation log2(3x-2) - log2 (x-5)=4
*June 23, 2013*

**math/ algebra **

solve the equation log (4x)= log5 + log(x-4)
*June 23, 2013*

**Math/Algebra**

Sketch the graph of each piecwise-defined function. Determine the domain and range. Identify each point of discontinuity. f(x)= -x if x<0 4-2x if 0 <or= x<3 2x+1 if x >= 3
*May 28, 2013*

**Math/Algebra**

Find the vertex, Focus,and Directrix of the parabola. Graph the equation. y^2=12x
*May 28, 2013*

**Math/Algebra**

Graph the ellipse and locate the foci. 16x^2 +9y^2= 144
*May 28, 2013*

**Math/Algebra**

Find an equation for the ellipse described. center(0,0); major axis horizontal with length10; length of minor axis is 8
*May 28, 2013*

**Math/ Algebra**

Find an equation for the hyperbola described: 1) Vertices at (0,+/- 10); asymptotes at y= 5/3x 2) Vertices at (-+5,0); foci at (-+6,0)
*May 28, 2013*

**Math/Algebra**

A bridge is built in the shape of a semi elliptical arch. It has a span of 96 feet. The height of the arch 29 feet from the center is to be 10 feet. Find the height of the arch at its center.
*May 28, 2013*

**physics**

Hey can you please tell the numrical answer I can`t get it :)
*April 29, 2013*

**math algebra **

Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x=
*April 16, 2013*

**math algebra **

Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x=
*April 16, 2013*

**math algebra **

Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x=
*April 16, 2013*

**ALGEBRA 2**

Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!
*April 16, 2013*

**ALGEBRA 2**

Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!
*April 16, 2013*

**Biology**

Humans have about 20,000 genes in our genome. Explain how cells differentiate into different kinds of cells even though they have the same set of 20,000 genes in their nuclei, so they are genetically identical.
*April 12, 2013*

**Maths**

its wrong steve
*March 19, 2013*

**Chemistry**

nevermind i got it
*March 16, 2013*

**Chemistry**

Hydrocinnamoyl chloride + AlCl3 --> ??
*March 16, 2013*

**Chemistry Equilibrium**

Which of the following conditions is always true at equilibrium? deltaG=0, Q=1, K=1, deltaG=deltaG(standard), deltaG(standard)=0, Q=0, deltaG(standard)=1 I'm so confused, please help!
*March 14, 2013*

**~*Math Probability*~**

Which expression would you use to figure out the number of ways you can arrange the letters in the word equation? (1 point) 8! 8P4 4P8 4! Five friends are having their picture taken. How many ways can the photographer arrange the friends in a row? (1 point) 150 100 120 80 How ...
*March 13, 2013*

**Calculus **

How would I solve the limit for this sequence. [n^(2)]*[1-cos(2.4/n)] I used L'Hopital's rule by putting n^(-2) in the bottom, but I got the wrong answer of -1.44 in the end. Please help, thanks!
*March 8, 2013*

**Chem Problem**

Nevermind, I figured it out!
*March 1, 2013*

**Chem Problem**

I need help solving this question, I have no idea what I'm supposed to do. What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.165 M in sodium chloride and 0.029 M in magnesium sulfate? Assume ...
*March 1, 2013*