Thursday
August 21, 2014

Posts by Hannah


Total # Posts: 2,827

social studies
1. Cuzco 2. are there many? this is what i found. In 1528, Emperor Huayna Capac (Young Lord) ruled the Inca Empire 3.Mound Builders
November 10, 2010

math
substract 3 from the right side and left eg- -1=3+4x -3 -3 then divide by 4 on the right and left side. eg- -4/4=4x/4 x=-1
November 10, 2010

math
first we want to get the like terms on the same side. so lets subtract 3 from both sides you get -4=4x then since we want x by itself we divide by 4 on both sides making the 4 cross out and we get -1=x
November 10, 2010

Spanish 1
the first 3 are def. correct. for the last one it seems like many could work. im not sure about that one either sorry but if i had to guess id think either a or b
November 10, 2010

Spanish 1
a)a-there b)d- a pencil
November 9, 2010

math
estimating quotients 811 divided by 2
November 9, 2010

chem
thanks so much!
November 9, 2010

chem
How many moles of O are in 13.5 mol Fe(NO3)3? i got 7.32e25 but soon realized that is totally wrong.
November 9, 2010

chem
so it would be .000006845 formula units?
November 9, 2010

chem
so do i have to convert .4 mg to grams first? that would be .0004 right? so then i just divide .004/58.44 and that will be my answer?
November 9, 2010

chem
nevermind i got the answer but i do have another question: A salt crystal has a mass of 0.40 mg. How many NaCl formula units does it contain?
November 9, 2010

chem
Determine the mass(in grams) of each of the following compounds. a) 0.709 mol magnesium fluoride i got 30.7grams but it was wrong. id appreciate the help! thanks! also if i end up getting the help i have a couple other questions
November 9, 2010

Math(Please help)
Show that (f X g)(x) = (g X f)(x) = x for f(x)= 3x-5 and g(x)= x+5 / 3 I have know idea how to do this.
November 8, 2010

Math
Find the inverse of the function f(x) = x / 2x+1 I know that you would make this x= y / 2x+1 but now I do not know what to do.
November 8, 2010

Math
Find the domain of (f X g)(x) if f(x) = 2 / x-3 and g(x) = 1 / x+4. I know the domain for g(x) is x cannot be -4 but I do not know what else to do.
November 7, 2010

Math
Find the inverse of the function f(x) = x / 2x+1 I know that you would make this x= y / 2x+1 but now I do not know what to do.
November 7, 2010

chemistry
The molality of a solute is the number of moles of that solute divided by the weight of the solvent in kilograms
November 4, 2010

Math
The following function f is one-to-one; find its domain and range. f(x) = 5 / x+3 Domain = x cannot be -3 Range= I do not know how to find this.
November 4, 2010

Math(Please check)
Sorry I already post this. Disregard this one.
November 4, 2010

Math(Please check)
Find the domain of the following rational function. R(x) = -3x^2 / x^2 + 2x - 48 (x+8)(x-6) So domain is x cannot be 8 or -6. Am I correct?
November 4, 2010

Math(Please check)
Find the domain of the following rational function. R(x) = -3x^2 / x^2 + 2x - 48 (x+8)(x-6) So the domain is x cannot be 8 or -6. Am I correct?
November 4, 2010

math
Thank You!
November 4, 2010

math
The function D(h)=7e^-0.4(h) can be used to determine the milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. How many milligrams will be present after 9 hours. Round three decimal places. so 7e^(-0.4 x 9) = .191 To get this ...
November 4, 2010

English
Thank you!
November 3, 2010

English
Most people think of bamboo as a tree or a bush. Is this transitive or intransitive? think = transitive
November 3, 2010

Math
The function D(h)=7e^-0.4(h) can be used to determine the milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. How many milligrams will be present after 9 hours. Round three decimal places. so 7e^(-0.4 x 9) = .191 To get this ...
November 3, 2010

Math
Find the x and y intercepts of the following function. f(x) = 9x - x^3
November 3, 2010

Math(Quick question)
The function D(h)=7e^-0.4(h) can be used to determine the milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. How many milligrams will be present after 9 hours. Round three decimal places. so 7e^(-0.4 x 9) = .191 To get this ...
November 3, 2010

Math(Please check)
O ok I understand. Thanks!!
November 3, 2010

Math(Please check)
So what is the inverse?
November 3, 2010

Math(Please check)
The following function is one-to-one; find its inverse f(x)=x^3+5 I know that the first step would be to set y = to x so I did y=x^3+5 Then you swap x with y so x=y^3+5. Then you solve for y and this is where I think i messed up. I did y^3=x-5 = y=x^3-5 Then the inverse would ...
November 3, 2010

Maths
What is dy/dx of e^-x ?
November 2, 2010

elementary functions
(x-4)(x+1)
November 2, 2010

algebra
1. (4x-3)(x-1) 2. Use the quadratic formula which you can find on youtube.
November 2, 2010

Maths
if f(x) = 2x - x ln x show that f(e^3) = -e^3 I know you have to substitute e^3 into the function, so Ive sone ths so far: 2e^3 - e^3 ln e^3 What is the next step?
November 1, 2010

MATH
you do do 24 divided by 8 and then times it by 7.
November 1, 2010

Maths
if f(x) = 2x - x ln x show that f(e^3) = -e^3 I know you have to substitute e^3 into the function, so Ive sone ths so far: 2e^3 - e^3 ln e^3 What is the next step?
November 1, 2010

Calculus
Determine whether the integral is divergent or convergent. If it is convergent, evaluate it and enter that value as your answer. If it diverges to infinity, state your answer as "INF" (without the quotation marks). If it diverges to negative infinity, state your ...
October 22, 2010

Calculus
Find the area between the curves y=(x^3)-10(x^2)+24x and y=(-x^3)+10(x^2)-24x
October 22, 2010

Calculus
Apparently it diverges to negative infinity. Can someone please explain to me why?
October 22, 2010

Calculus
Determine whether the integral is divergent or convergent. If it is convergent, evaluate it and enter that value as your answer. If it diverges to infinity, state your answer as "INF" (without the quotation marks). If it diverges to negative infinity, state your ...
October 22, 2010

History
34. Designed as an attempt to secure the loyalty of the French to their new rulers, this act broke new ground in toleration and statesmanship. Unfortunately for the British, the Americans saw only sinister designs. This act was the a. Treaty of Paris, 1783 b. Tea Act c. Statue...
October 22, 2010

social studies
What is an example of Human-Environment Interaction in Vatican City?
October 20, 2010

Physics
Oh gotcha. But how come friction=centripetal force? I thought since net force is towards the center they can't cancel each other out like that...
October 19, 2010

Physics
How come a heavy truck and a small car can both travel safely at the same speed around an icy, banked-curve road? I would think that since mass is increased, normal force is therefore increased, and force of friction is therefore increased. And since the opposing force, the ...
October 19, 2010

physics
(a) 264 (b) 461.49 (c) 0
October 18, 2010

Algebra
A saline solution was made by mixing 11 ml of a 36% saline solution and 6 ml of a 53 % saline solution. How do I find the consentration of the new mixture?
October 18, 2010

6th grade math
what is the answer showing work to 8(2h-10)=16h
October 17, 2010

Chemistry
nevermind i got it. thanks
October 14, 2010

Chemistry
What are the charges of the ions in an ionic compound containing iron(III) and fluoride ions? a)iron(III)- i got 3+ b) flouride- im not sure on this one c)Write the formula for the compound. (Type your answer using the format CO2 for CO2.) - Fe3F2... i rly have no idea on this...
October 14, 2010

repost-chem
ok. thanks. I have a question about it that i posted on my previous post. think u could check it out? thanks
October 13, 2010

repost-chem
Write a formula for the compound that forms from barium and the following polyatomic ion. (a) hydroxide (b) carbonate (c) phosphate (d) hydrogen phosphate basicaly all i know is that all of these are going to start with Na. I need major help! thanks:)
October 13, 2010

chemistry
I get the first 2 but how did u get the second two?
October 13, 2010

chemistry
Write a formula for the compound that forms from barium and the following polyatomic ion. (a) hydroxide (b) carbonate (c) phosphate (d) hydrogen phosphate basicaly all i know is that all of these are going to start with Na. I need major help! thanks:)
October 13, 2010

Math
Find the equation for the line with the following. parallel to the line 8x+7y=-7 and containing the point (7,-7) Since it it parallel the equation would have to have 8x, right? Then im not sure what to do.
October 7, 2010

Math
Find all points having x-coordinate 9 and distance 10 from the point (3,-2). Would I use the distance formula here?
October 7, 2010

Math
So for the diameter I got 136. This that right?
October 7, 2010

Math
Find the center and the radius of the circle which (6,-2) and (-4,4)are endpoints of a diameter. Please help!
October 7, 2010

Math
Find the requested function and state its domain: f(x)= 4x+3 g(x)=4x-5 Find f/g and its domain. So I did 4x+3/4x-5, so the 4x's cancel out and 3/-5 is left. So my answer is 3/-5. Is this correct Now I just need to find the domain which I am not to sure about.
October 7, 2010

math
how can you use rounding to estimate 331+193
October 7, 2010

Math
I got y=-10/3 x + b Then I used (-5,4) so 4=-10/3(-5) + b and I got y=-10/3x - 46/3. I am not sure if I multiplied and added the fractions correctly
October 7, 2010

Math
Find an equation for the line with the given properties. Containing the points (-5,4) and (-2,-6) Please help!
October 7, 2010

Math
Given the function f(x)= x^2-3 / x+1, what point on the graph corresponds to x=-2? I have no idea what to do. Am I suppose to plug in -2 into the equation?
October 7, 2010

Math
Find the requested function and state its domain: f(x)= 4x+3 g(x)=4x-5 Find f/g and its domain. So I did 4x+3/4x-5, so the 4x's cancel out and 3/-5 is left. So my answer is 3/-5. Is this correct Now I just need to find the domain which I am not to sure about.
October 7, 2010

Math(Please check)
Determine whether the graph of the following equation is symmetric with respect to the x-axis, the y-axis, and the origin. y^2 - x - 49 = 0 For x axis -y^2 - x - 9 = 0 is not the same as the first equation so it is not symmetrical to the x-axis. Correct? For the y-axis y^2 + x...
October 7, 2010

Math(Please, Please, help)
Nevermind,I did not realize that my question was already answered.
October 7, 2010

Math(Please, Please, help)
For f(x) = 2x-3 and g(x)= 2x^2 find, a) (f + g)(x) = My answer is 2x^2 + 2x - 3. Is this correct? b) (f - g)(x) How would you do this? c) (f X g)(2) I do not know what to do since the 2 is there. Determine whether the graph of the following equation is symmetric with respect ...
October 7, 2010

Math
For f(x) = 2x-3 and g(x)= 2x^2 find, a) (f + g)(x) = My answer is 2x^2 + 2x - 3. Is this correct? b) (f - g)(x) How would you do this? c) (f X g)(2) I do not know what to do since the 2 is there. Determine whether the graph of the following equation is symmetric with respect ...
October 6, 2010

Math(Please check)
why 9?
October 6, 2010

Math(Please check)
Find the center (h,k) and radius of the following circle. x^2 + y^2 - 6x - 2y + 1 = 0 My answer is center= (-3,-1) and radius of 1. Am I correct?
October 6, 2010

Math(Please help)
Sorry I wanted to add something else! Determine whether the graph of the following equation is symmetric with respect to the x-axis, the y-axis, and the origin. y^2 - x - 49 = 0 For x axis -y^2 - x - 9 = 0 is not the same as the first equation so it is not symmetrical to the x...
October 6, 2010

Math(Please help)
For f(x) = 2x-3 and g(x)= 2x^2 find, a) (f + g)(x) = My answer is 2x^2 + 2x - 3. Is this correct? b) (f - g)(x) How would you do this? c) (f X g)(2) I do not know what to do since the 2 is there.
October 6, 2010

Math
Find the slope intercept form of the line with the following properties. Slope=4 containing the points (-2,-5) I know that slope intercept form is y=mx+b so the m is the slope which is 4 but now I get confused since they give me x any y values (-2,-5). Is it just y which is -5...
October 6, 2010

Math
These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of the following ...
October 6, 2010

Math(Please check answers)
These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of the following ...
October 6, 2010

Math
Find the slope intercept form of the line with the following properties. Slope=4 containing the points (-2,-5) I know that slope intercept form is y=mx+b so the m is the slope which is 4 but now I get confused since they give me x any y values (-2,-5). Is it just y which is -5...
October 6, 2010

Math(Please help)
Thank You!!
October 5, 2010

Math(Please help)
Write an equation of the line satisfying the given condition. a) x intercept = 3 y intercept=-2 I am really not sure how to start here. b) vertical line containing (5,-1) Would it be y=5x-1? c) parallel to the line 3x-4y=5 and containing the points (3,-6) . I know that the ...
October 5, 2010

Math
Write an equation of the line satisfying the given condition. a) x intercept = 3 y intercept=-2 I am really not sure how to start here. b) vertical line containing (5,-1) Would it be y=5x-1? c) parallel to the line 3x-4y=5 and containing the points (3,-6) . I know that the ...
October 5, 2010

algebra
oops the right numbers are suppose to be under the x
October 5, 2010

algebra
like jannie said.. so your table would look something like _y____x_ -2 -5 -1 -4 0 -3 1 -2 2 -1 3 0 4 1 you can basically choose any number you want x to be then find y
October 5, 2010

Math
yes its correct!
October 5, 2010

Math
Yep:) that is the correct answer
October 5, 2010

Math
does 2-6=2?
October 5, 2010

Math
Hm... i posted on here.. idk y its not here but.. Ok so we know that the ones place has to be 2more than the tens place so which number has ones place-tens place=2?
October 5, 2010

Math
State whether the equation defines y as a function of x. a) y=x^2-2x Yes b) y^2 = 3x-4 No c) 5x+7y=10 Yes Are my answers correct?
October 5, 2010

Math(Please check! Thank You)
List the intercepts and test for symmetry. y^2 - x - 4 = 0 I got (-4,0) and (0,2) for the intercepts. -y^2 - x - 4 = 0 Is not symmetrical to the x axis, correct? y^2-(-x) - 4 = 0 Is not symmetrical to the y axis, correct? -y^2 + x - 4 = 0 Is not symmetrical to the origin, ...
October 5, 2010

Math(Please check)
Lsit the intercepts and test for symmetry. y^2 - x - 4 = 0 I got (-4,0) and (0,2) for the intercepts. -y^2 - x - 4 = 0 Is not symmetrical to the x axis, correct? y^2-(-x) - 4 = 0 Is not symmetrical to the y axis, correct? -y^2 + x - 4 = 0 Is not symmetrical to the origin, ...
October 5, 2010

Math
2w-4/2w the only factor of 1 is 1. I dontknow how they want you to solve this with only factors of one. but you could divide both sides by 2. so you get w-2w
October 3, 2010

Math
the scientific notation would be: 8.17X 10^7 in scientific notations the decimal always has to be after the first non-zero number
October 3, 2010

chemistry
what is the equation for gamma decay?
October 3, 2010

algebra
the answer would be: -36s^2q. the s is squared and the q not because your multi. SQ*3S. so there are 2 S's but only one q.
October 3, 2010

graph on excel
oops the numbers after the 1,2,3 etc. are suppose to be in the right column
October 3, 2010

graph on excel
ok so I did a radiation and distance lab: this is my results: Distance(cm) Counts(30 sec) 0 1729 1 634 2 391 3 239 4 150 5 124 6 114 7 82 8 58 9 62 10 60 11 36 12 45 so it asks me to make new columns on excel titled the following:(note: the 2 and 3 are superscripts) 1/distance...
October 3, 2010

Math
Thank You!
October 2, 2010

Math
Find the intercepts of the equation y=2x-1 by plotting points. To plot this would I just plot 2,0 and then go down 1?
October 2, 2010

Math(Please help)
Determine whether the points (0,3)(-2,0)(2,7) are on the graph of the equation y = x^3 - 2x +3? How would I do this?
October 2, 2010

physics
Surprisingly, very few athletes can jump more than 2.6 ft (0.8 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.6 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.
September 30, 2010

physics
Consider a pair of forces, one having a magnitude of 48 N, and the other 43 N. What maximum net force is possible for these two forces?
September 30, 2010

Pre-Calc
A rectangular package to be sent by a delivery service can have a maximum combined length and girth (perimeter of a cross section) of 120 inches. a. Show that the volume of the package is V(x)= 4xsquared(30-x) b. Use your graphing calculator to find the dimensions of the ...
September 26, 2010

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