Wednesday

September 24, 2014

September 24, 2014

Total # Posts: 90

**ap bio**

I am stumped on this one. Amontg bryophytes, which of the following contain distinct stemlike axis, small leaves, and rootlike rhizoids? a. cycads b. liverworts c. mosses d. hornworts e. algae I am leaning towards mosses, but I'm really not sure.
*November 2, 2009*

**ap bio**

Hornworts differ from mosses and liverworts in containing: a. small leaves b. photosynthetic sporophytes c. gametphytes d. sporophytes e. spores Well, First I thought ok its small leaves and that was wrong. Next I thought it would be spores and that was wrong. My next guess ...
*November 2, 2009*

**PreCalc (Just Can't Comprehend)**

When I graphed it, I got a reciprocal function not a parabola. I don't know how to find a minumum that's not a parabola or a cubic. Should I just go with the guess and check and call it 20 X 20?
*November 1, 2009*

**PreCalc (Just Can't Comprehend)**

Find the dimensions of the rectangle with minimum perimeter if its area is 400 square meters. Find the least perimeter. I know that a rectangle has two sides that are equal and two other sides that are equal but I am unsure about what type of equation to use. I thought maybe I...
*November 1, 2009*

**PreCalc (still confused)**

Ok, well now I'm really confused. I thought about substituting 400/x into y but I still don't have anything to put it equal to. Can you please try to explain it.
*November 1, 2009*

**PreCalc (still confused)**

So basically, I have to guess and check. 20 X 20 would be the smallest but is a square. How about 16 X 25 = 82? I would much rather have a mathematical way to go about it.
*November 1, 2009*

**PreCalc (still confused)**

Hello and Happy Halloween! Trying to get this problem and could use some help. Find the dimensions of the rectangle with minimum perimeter if its area is 400 square meters. Find the least perimeter. I know that a rectangle has two sides that are equal and two other sides that ...
*November 1, 2009*

**Pre Calc**

So I was correct the answer is i right?
*October 31, 2009*

**Pre Calc**

My question is I^793 I think the answer is just I because it is the only number that can go into it. Is that correct?
*October 31, 2009*

**PreCalc**

Hello and Happy Halloween! Trying to get this problem and could use some help. Find the dimensions of the rectangle with minimum perimeter if its area is 400 square meters. Find the least perimeter. I know that a rectangle has two sides that are equal and two other sides that ...
*October 31, 2009*

**pre calculus**

Use the following conditions to create a sketch of the function by hand. a. vertical asymptote at x=3 b. x-intercept of 1 and 5 c. f(2)=f(4)=f(6)=3 d. increasing on [0,3) and [5,infinity) e. decreasing on (3,5] f. f(x) is an odd function I don't know how to graph this. It ...
*October 26, 2009*

**Pre Calc one more thing**

When I plug them in they don't work. am I plugging them in wrong or is it no solution?
*October 24, 2009*

**Pre Calc still confused**

Solve: (x+5/x)+(6/x-4)=(-7/x^2-4x) I multiplied the entire function by x and x-4 and after doing that I got down to the quadratic equation x^2+7x-13=0 I did the quadratic and got x=1.525 and -8.525 I feel like I made a mistake because when I plug in both of those answers for x...
*October 24, 2009*

**pre calc**

I'm not quite sure what you mean. Can you please elaborate
*October 24, 2009*

**pre calc**

Solve: (x+5/x)+(6/x-4)=(-7/x^2-4x) I multiplied the entire function by x and x-4 and after doing that I got down to the quadratic equation x^2+7x-13=0 I did the quadratic and got x=1.525 and -8.525 I feel like I made a mistake because when I plug in both of those answers for x...
*October 24, 2009*

**PRE-CALC still stuck**

Oh? Now I get it. thanks
*October 18, 2009*

**PRE-CALC still stuck**

Write the statement as a power function equation. Use k for constant of variation if one is not given. a. Charles's law states the volume V of an enclosed ideal gas at a constant pressure varies directly as the absolute temperature T. b. The volume V of a circular cylinder...
*October 18, 2009*

**Pre Calc (question was never answered)**

Write the statement as a power function equation. Use k for constant of variation if one is not given. a. Charles's law states the volume V of an enclosed ideal gas at a constant pressure varies directly as the absolute temperature T. b. The volume V of a circular cylinder...
*October 17, 2009*

**Pre-Calc**

Write the statement as a power function equation. Use k for constant of variation if one is not given. a. Charles's law states the volume V of an enclosed ideal gas at a constant pressure varies directly as the absolute temperature T. b. The volume V of a circular cylinder...
*October 16, 2009*

**PRE-CALC**

Thanks :D
*October 16, 2009*

**PRE-CALC**

oops, my mistake (x-3)/x + 3/(x+2) = -(6/(x^2+2x)) Sorry, missed the =
*October 16, 2009*

**PRE-CALC**

oops, my mistake (x-3)/x + 3/(x+2) + -(6/(x^2+2x)) I missed the negative sign
*October 16, 2009*

**PRE-CALC**

oops, my mistake (x-3)/x + 3/(x+2) + 6/(x^2+2x)
*October 16, 2009*

**PRE-CALC**

Hi here is my question: Solve: (x-3)/x+3/x2=-6/x^2+2x For my solutions, I got -2 and 0, but the problem is, when I plug the numbers back in, I have zero in the denominator which I know you can't have. I'm not sure what I did wrong, or is it just undefined?
*October 16, 2009*

**algebra 2**

Hi Sara, You have to create a system of equations. First 3x+4y=1323 Second x+y=400 Now use substitution to solve Can you take it from here?
*October 16, 2009*

**PRE-CALC**

Thanks, that was a big help :)
*October 16, 2009*

**PRE-CALC**

Oh, these word problems make me feel so dense sometimes. Okay, so I got 54.5 and 51.5 as my demensions. Is that correct?
*October 16, 2009*

**PRE-CALC**

Can you please explain the x-2 and x+1, I'm not sure how you got that.
*October 16, 2009*

**PRE-CALC**

A large painting in the style of Rubens is 3 feet longer than it is wide. If the wooden frame is 12 in wide and the area of the picture frame is 208 ft^2, find the dimensions of the painting. So I know the width would be x and the length would be x+3 if I do 12x=208, I get 17....
*October 16, 2009*

**Biology**

In the cyclic reaction sequence called the krebs cycle, which chemical event does not take place? a.The acetyl group is joined with a four carbon molecule, oxaloacetate. b. Two carbons per cycle are made into CO2 molecules. c. Electrons generated are used to produce NADH. d. ...
*October 15, 2009*

**AP Bio**

Please take a look at my AP bio question from last night. I still need help! Thanks
*October 14, 2009*

**AP Bio**

Hi I am stumped on an ap bio homework question: In the cyclic reaction sequence called the krebs cycle, which chemical event does not take place? a.The acetyl group is joined with a four carbon molecule, oxaloacetate. b. Two carbons per cycle are made into CO2 molecules. c. ...
*October 13, 2009*

**ap calc**

OOPS, I meant Pre-Calc not ap Calc sorry
*October 10, 2009*

**ap calc**

A pool, that is 12 feet wide and 18 feet long, is to have a sidewalk of uniform length constructed around its perimeter. a. write the equation for the area A, of the pool with the sidewalk b. determine the domain of the area of the pool with the sidewalk c. what would the ...
*October 10, 2009*

**Precalc**

Can you simplify radical 253?
*October 9, 2009*

**Pre Calc**

| * * | * *------+------* * | | | * * | | | * | | | * | | | * | | | | | | - * - -+------+------+- - * - | I found this picture online and this is the picture my teacher gave. Can we please start from the beginning. Here is the question again: A rectangle is inscribed between ...
*October 5, 2009*

**Pre Calc**

I already asked this question and had some help, but I am still confused on a piece of it. I'm not sure what differentiate is. I understand how you got a and b, but I am confused with c. What is differentiate and how did you get the equation dA/dx = 72 - 6x^2 Question: ...
*October 5, 2009*

**pre calculus**

f(x)=7x-4 So, you substitute: a. 7(0)-4=-4 b. 7(-3)-4=-25 can you take it from here?
*October 4, 2009*

**Pre Calc To Reiny - Follow up on Pre-Calc Answer**

Pre-Calc - Follow-up for Reiny - MUFFY, Saturday, October 3, 2009 at 10:27pm I wasn't sure if you would notice my question since it is so much later so I re-sent this as a new question. Please let me know if I shouldn't do that. I understand how you got a and b, but I ...
*October 3, 2009*

**Pre-Calc - Follow-up for Reiny**

I understand how you got a and b, but I am confused with c. What is differentiate and how did you get the equation dA/dx = 72 - 6x^2
*October 3, 2009*

**Pre-Calc**

Here I am again stuck with another geometry type question. Here goes: A rectangle is inscribed between the x-axis and the parabola y=36-x^2 with one side along the x-axis. He drew the picture with the parabola at points (-6,0) (6,0) (0,6) the rectanle is drawn inside the ...
*October 3, 2009*

**PreCalc**

Use the following conditions to create a sketch of the function by hand. a. f(x) is increasing from (-infinity,-4)union(-4, infinity) b. there is a vertical asymptote at x=-4 c. There is a horizontal asymptote at y=2 d. f(0)=-5; f(1)=-3; f(3)=1 I have an idea of what this ...
*September 30, 2009*

**Pre-Calc**

Determine the center and the radius of the following circle: x^2+y^2+6x-4y-5=0 I got for the radius 3(sqrt2) I got for the center (-3,2) Can you please tell me if I am correct? The radius seems wierd.
*September 29, 2009*

**Pre-Calc**

Thank you for your guidance! Have a great night.
*September 26, 2009*

**Pre-Calc**

Ok, so I got x=0 x=1 x=0 x=-1 is that right?
*September 26, 2009*

**Pre-Calc**

Determine the solution. x^2=|x|algebraically I have no idea how to proceed with this. Can you please help?
*September 26, 2009*

**Pre-Calc**

Thanks so much. Any ideas on my other question?
*September 26, 2009*

**Pre-Calc**

A pizzeria sells a rectangular 18 X 24 inch pizza for the same price that it sells its large 24" diameter pizza. If both pizzas have the same thickness, which option gives the most pizza for the money. Gosh I'm really rusty on my geometry. Can you give me an idea of ...
*September 26, 2009*

**Pre-Calc**

I used the same equation you said then put it in the graphing calculator and found the intersection points. I'm thinking that you would put [.42,9.46) to show that it is more than .42 and less than 9.46.
*September 24, 2009*

**Pre-Calc**

An open box is formed by cutting squares out of a piece of cardboard that is 22 ft by 27 ft and folding up the flaps. What size corner squares should be cut to yield a box that has a volume of less than 235 cubic feet? I know that the size corner squares are .42 and 9.46. My ...
*September 24, 2009*

**PRE-CALC**

Determine the domain of the following function: f(x)=sqrt x-7/x^2-5x-6 I think the domain is [7,all real numbers) Can you please tell me if this is correct?
*September 21, 2009*

**PRE-CALC**

:) Thanks!
*September 20, 2009*

**PRE-CALC**

Ok, so you're using the pathagorean theorum. I'm a bit rusty on my geometry so does that make it a right scalene?
*September 20, 2009*

**PRE-CALC**

Determine the name of the following triangle using the given points: A(5,6), B(-1,-2) and C(-3,2). Be as specific as possible. I used the distance formula and found that AB had a side of 10 BC had a side of 2 sqrt 5 CA had a side of 4 Sqrt 5 I found that since all sides are ...
*September 20, 2009*

**pre-calculus**

Thanks so much for your explanation. I was able to figure it out and now got your answer.
*September 18, 2009*

**pre-calculus**

Determine the center and the radius of the following circle: x^2+y^2+8x-2y=8 so I figured I'd use completing the square after putting it in standard form: (x^2+8x)+(y^2-2y)=8 I'm not sure where to go from here.
*September 18, 2009*

**ap calculus**

Thanks for the info. I will ask my teacher on Monday.
*September 18, 2009*

**pre-calc**

oops! don't know why I put AP Calc, it's actually pre-calc....
*September 18, 2009*

**ap calculus**

The height s of a ball, in feet, thrown with an initial velocity of 112 feet per second from an initial height of 6 feet is given as a function of time t (in seconds) by s(t)=-16t^2+112t+20. 1. What is the maximum height of the ball? 2. At what time does the maximum height ...
*September 18, 2009*

**pre-calc Question on a previous question**

Figured it out -- sorry for doubting you. It's right!
*September 17, 2009*

**pre-calc Question on a previous question**

On the question below, Bob Pursley said it was correct, however, I just wanted to make sure that it's not supposed to have another x value since it has x^2 in it. Solve the inequality: (2x-3)(4x)+x^2=>(3x+4)^2 I did 2x-3*4x 9x^2-12x on the left side on the right side: ...
*September 17, 2009*

**anatomy**

OMG!!!! I can't believe I did that, thanks so much for your help
*September 15, 2009*

**anatomy**

so if the liver is below the diaphram and the lungs are above the diaphram isn't it inferior. Am I looking at this incorrectly?
*September 15, 2009*

**anatomy**

The question states the lung is ______ to the liver I think it is inferior
*September 15, 2009*

**anatomy**

Yes, I do know the meanings however I am confused because they both mean that they are away from the midline of the body Inferior is from the head down lateral is away from the mid I'm thinking lateral but still not positive can you clear it up for me?
*September 15, 2009*

**anatomy**

is the liver inferior or lateral to the lungs
*September 15, 2009*

**AP bio**

Thanks, but I'm still really confused (that seems to be my mantra lately). I haven't had chemistry for 2 years and I'm at a loss, where to next?
*September 12, 2009*

**AP bio**

My teacher said this is a very hard question, but I'm trying to make an attempts. Can you guide me? A biologist places a plant in a closed chamber. A sensor in the chamber maintains the carbon dioxide level at the normal atmospheric concentration of 0.03%. Another sensor ...
*September 12, 2009*

**AP Bio**

This is the summary formula for photosynthesis: 6CO2+6H20 yields C6H12O6+6O2 Refer to the summary formula for photosynthesis. If you know the number of molecules or moles of any of the reactants used (or products produced), how would you calculate the number of molecules or ...
*September 12, 2009*

**Math**

THANKS!
*September 12, 2009*

**Math**

Hello, Having trouble with this one... Solve the inequality: (2x-3)(4x)+x^2=>(3x+4)^2 I did 2x-3*4x 9x^2-12x on the left side on the right side: 9x^2+24x+16 I substracted everything on the right side over to the left and made it => zero 9x^2-12x-9x^2-24x-16=>0 -36x-16...
*September 12, 2009*

**math**

Thank you soooooooo much, you are a great teacher! I truly understand!
*September 12, 2009*

**math**

Shelby can paint a room in 4 hours. Zoe can paint the same room in 7 hours. How long will it take them to paint the room if they work together? If they start 9:30a.m., and want to see a movie that is playing 45 minutes from their house and starting 12:00 p.m., will they make ...
*September 12, 2009*

**Math**

Ok, thanks so much for your explanations. So, is the max area 8,000,000?
*September 12, 2009*

**Math**

Thanks. I'm still confused though. I'm not sure how you got Area= W(8000-2W)= 8000w-2W^2 What happened to the L Do I need a system of equations? Sorry, this has got me stumped.
*September 12, 2009*

**Math**

A farmer with 8000 meters of fencing wants to enclose a rectangular plot that borders on a river. If the farmer does not fence the side along the river, what is the largest area that can be enclosed? Does that mean I have to consider it a triangle?
*September 12, 2009*

**Algebra 1**

Thanks, getting something right gives me great confidence!
*September 12, 2009*

**Algebra 1**

You have to solve the absolute value first, then change the sign to the opposite. So, it is 4.3 + -7.2 = -2.9 Then take the absolute value of -2.9 which is 2.9
*September 12, 2009*

**Pre Calc**

Please disregard, I found your answer.
*September 10, 2009*

**Pre Calc**

Someone did answer it, however, I believe that their answer is incorrect. Also, I changed my answer a bit. I'm sorry, I messed up but I am becoming very frustrated with this problem.
*September 10, 2009*

**Pre Calc**

Does this: sqrt 3x-4=(x-4)^2-3 Multiply out to: x^4-16x^3+90^2-211x+173 I then need to put it in the graphing calc and see what the roots are.
*September 10, 2009*

**Pre-Calculus**

I'm looking at your solution and I can't figure out where that -6 came from.
*September 10, 2009*

**Pre-Calculus**

Oh thanks didn't see this post. I realized I needed to make it equal zero. I keep getting 90 x^2 instead of 102 and 173 instead of 166. Why do they make this so hard?
*September 10, 2009*

**Pre-Calculus**

Does this: sqrt 3x-4=(x-4)^2-3 Multiply out to: x^4-16x^3+90x^2-111x+173 Once I know it is multiplied out right then I can continue. Thanks
*September 10, 2009*

**biology**

I have some questions that relate to table 2.1 which lists the chemical elements that occur naturally in the human body. Similar percentages of these elements are found in most living organisms. a. In what abiotic (non-life) chemical forms are these elements often found in ...
*September 10, 2009*

**biology**

Please help. Can you tell me how to find 1. what is the weight of 1 mole of pure sodium (Na)? 2. How many molecules of Na are in 1 mole of Na?
*September 10, 2009*

**Pre-Calculus**

No, I have never solved a quartic nor am I familiar with working with complex numbers. The only thing I have used is the rational roots theorem and that doesn't work here. Does that mean it can't be solved on the graphing calculator? Is there any way for you to guide ...
*September 8, 2009*

**Pre-Calculus**

Actually, It is not a parabola, it is a W shape. I try to adjust my window and still can't see it on the screen ok. please help
*September 8, 2009*

**Pre-Calculus**

x^4-16x^3+90x^2-111x+173 When I put this equation into the graphing calculator, I get a parabola. I'm not sure how to find the zeros. Can you help?
*September 8, 2009*

**pre-calculus**

3x^3 -2x^2 - 7x - 4 = 0 Can you please help teach me how to put this equation into the graphing calculator.
*September 8, 2009*

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