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August 5, 2015

Posts by Jen


Total # Posts: 3,337

chemistry
2.36 L of an aqueous solution containing 39.0 g of KCl dissolved in pure water is prepared. The molarity of the solution is?
February 8, 2011

gen chem 2
In the chemical kinetics experiment, determine the dilution of the stock bleach solution. The bleach used will be around 5.5% (weight/volume). Convert this to molarity
February 8, 2011

algebra
5 1/3-3 5/6..make sure to change to common denominators
February 7, 2011

math
6 with 9 0's...6,000,000,000
February 7, 2011

Chemistry
how to figure The grams of protein in 1 cup of soup that has 98 {\rm Cal} with 6 {\rm g} of fat and 8 {\rm g} of carbohydrate
February 7, 2011

Chemistry
Which will evaporate faster, 50ml of 1.0m NaCl or 50ml of pure water?
February 6, 2011

College Chemistry
Consider a .0500m solution.HClO2such that36% of the molecules dissociated when dissolved in water. Calculate the vant Hoff factor for this solution is hclo2 is36% associated
February 6, 2011

physics
a 2.0kg block is pushed against a spring that has a force constant of 10 n/m. the spring is compressed 10 cm. when the block is released, it slides across a rough surface for 25 cm before it stops. find the coefficient of friction between the block and the surface.
February 6, 2011

Algebra
Flying against the wind, Lisa made the flight from Reno in 3 h with a steady airspeed of 400km/h. Returning later with a tail wind that had doubled in magnitude, she landed 225 km beyond the starting point in 3 h. What was the original wind speed? How far from Reno did she ...
February 6, 2011

math
I thought your answer was funny, anon. Brianna, do you know what bisect means? You need to look up that word if you don't.
February 2, 2011

Algebra- is my answer right
Simplify. (2b^-4 c^6)^5 I get b^20/32c^30 Is that right? Write your answer using only positive exponents.
February 1, 2011

Algebra- is my answer right
Thanks, I see what I did, I squared when adding to the right side
February 1, 2011

Algebra- is my answer right
Graph the Circle x^2+y^2+4x-2y-20=0 I get: (x^2+4x)+(y^2-2y)=20 (x^2+4x+4)+(y^2-2y+1)=20+16+4 (x+2)^+(y-1)^2=(40/2)^2 But I don't think its right can you help me with what I did wrong? Thanks
February 1, 2011

Algebra- is my answer right
I see what I did, Thanks
February 1, 2011

Algebra- is my answer right
Use the rational zeros theorem to list all possible rational zeros of the following. -2x^3-x^2-4x-5 I got +-1,+-5+-,5/2,+-1/2 Be sure that no value in your list appears more than once.
February 1, 2011

Algebra
logx1/64=-3 Solve for x
February 1, 2011

Algebra
The midpoint of (AB) is M = (1,3). One endpoint is A =(8,-2). Find the coordinates of the other endpoint B.
January 28, 2011

Algebra
Add: (2/3x^2-4x-1)+(1/3x^2-19x+28) Simplify as much as possible.
January 28, 2011

Algebra
I figured it out.
January 28, 2011

Algebra
Suppose that the functions q and r are defined as follows: q(x)=2x+1 r(x)=-2x^2+1 Find the following: (qOr)(4)= (rOq)(4)=
January 28, 2011

5th grade math
ok just subtract.first subtract the denominator the the numetator.ooo and ifyour teacher is picky like mine the reduce it
January 27, 2011

algebra2
48x3z5y - 36x3z3y4 + 48x2z5y The GCF of 48, 36, and 48 is 6; " x^3, x^3, x^2 is x^2; " z^5, z^3, z^5 is z^3; " y, y^4, and y is y (you figure it out because its the most they all have in common) 6x^2z^3y( ) Now take that out and see what's left. Post it if ...
January 26, 2011

math
No, Raluca, it's 3:2.
January 26, 2011

math
There are 15 boys. Out of 25 students, that means there are 10 girls. Reduce 15/10 for your answer.
January 26, 2011

math
What are the directions...?
January 26, 2011

math
Mick, take 14 objects (maybe pencils or paper clips) and try to split them in 2 equal groups. See if you're able to.
January 26, 2011

analogies
scripted? no idea..
January 26, 2011

Algebra
The polynomial function f is defined by f(x)x^4-3x^3-2x^2+4x+5. Use a graphing calculator to find all the points (x,f(x)) where there is a local maximum. Round to the nearest hundredth
January 25, 2011

Math
A loan of $37,000 is made at 3%interest, compounded annually. After how many years will the amount due reach $49,000 or more? (Use the calculator provided if necessary.) Write the answer as a whole number. ****I get 1.03^10 = 49,724.91 So is the answer 10 years at 49,725.00?
January 24, 2011

Algebra
I get 1.03^10 = 49,724.91 So is the answer 10 years at 49,725.00?
January 24, 2011

Algebra
A loan of $37,000 is made at 3%interest, compounded annually. After how many years will the amount due reach $49,000 or more? (Use the calculator provided if necessary.) Write the answer as a whole number.
January 24, 2011

Math
Multiply. (-1/5) X(-7)X(4/7) Write your answer as a fraction in simplest
January 24, 2011

Math Please Help
Thank You so much!
January 24, 2011

Math Please Help
I still can't get it, I will just hit the I don't know button because I'm stressing over it to much.
January 24, 2011

Math Please Help
The answer cannot be in a radical form
January 24, 2011

Math Please Help
Solve for v. v+6/5=3/5v-7/3 Simplify your answer as much as possible.
January 24, 2011

Algebra
f(x)=4x^-5x f(0) f(-1) f(2) All you have to do is put the number given in for x. I will do the first one for you. 4(0)^-5(0) 0^0=1
January 23, 2011

College Algebra
Ok I will try to figure it out and ask if I need anymore questions. thanks for your help
January 22, 2011

College Algebra
Please help me Divide. (9x^3-10+19+6x^4)/(-2x^2+3x-3) Write your answer in the form Q(x)+ R(x)/ -2x^2+3x-3, where Q(x) is the quotient and R(x) is the remainder.
January 22, 2011

pre algebra
3w+2+3w=-4+9 6w+2=5 6w=3 w=1/2 Now put 1/2 back into the original problem. 3(1/2)+2+3(1/2)=-4+9
January 22, 2011

math
10 * 3 = ? Count by 10's three times.
January 21, 2011

math
I would round by doing 20 * 30, since 25 is exactly halfway between. 2 * 3 = 6, put 2 0's on the end..600
January 21, 2011

5th grade
Which of those numbers do you see the most often? That is your mode. Example: 1, 3, 6, 1, 2, 3, 6, 3..your mode is 3 because it occurs most often.
January 20, 2011

physics
You're at a Red Rocks concert on a cold January evening. The temperature is -8 degrees Celsius and you've got amazing front row tickets, the players are only 5.5 m away. How long does it take for sound to arrive to you from the stage? Calculate your answer in seconds,
January 20, 2011

English
1. Good. summer house? cottage? 2. Any 3. Any 4. bobsledding, not I was involved in
January 20, 2011

Math - Calculus
Integration of (sinx + cosx)^2 from 0 to pi/2. I get pi/2 + 1 as my final answer... wondering if that's correct?
January 19, 2011

physics
a 2kg mallet is dropped from a height of .6m onto a nail, driving it 3.5 cm into the wood. What is the average force exerted by the mallet on the nail? thanks
January 19, 2011

Chemistry
A 10.8g sample of a gas has a volume of 5.25L at 25 degrees Celsius and 766mmHg. If 2.3g of the same gas is added to this constant 5.25L volume and the temperature raised to 68 degrees Celsius, what is the new gas pressure?
January 18, 2011

Math
12:15
January 17, 2011

alegebra 2
What are the directions...
January 17, 2011

Math
In a mathematics olympiad there are 20 finalists. In how many ways can three equal prizes be awarded, assuming that two prizes cannot be given to one finalist? In how many ways can a first, second and a third place be awarded? (I understand that Permutations and Combinations ...
January 17, 2011

physics
A model rocket leaves the ground, heading straight up at 47 m/s. (a) What is its maximum altitude? m What are its speed and altitude at each of the following times? (b) 1 s m/s m (c) 4 s m/s m (d) 8 s m/s m
January 16, 2011

chem
the gap between two brain cells is 0.0020 nm. how many meters is this
January 15, 2011

math
13c+7d=99.8 12c+7d=84.11 Multiply the 2nd equation by -1 13c+7d=99.8 -12c-7d=-84.11 c= Plug that back into either original equation to solve for d.
January 15, 2011

English
1 is kind of awkward. I would change come to take.
January 14, 2011

pre algebra
the midpoints of each side of triangle NOT are connected to make a smaller triangle inside triangle NOT. If the area of triangle NOT is 16 in squared, what is the area of the smaller triangle?
January 13, 2011

algebra
what is the height of a solid with a volume of 120m3 and a base area of 30 m2
January 12, 2011

English
How do I write an outline for a paper?
January 12, 2011

Spanish
You have to post it first.
January 12, 2011

math
300 * 3 = 900
January 11, 2011

Math
They were different size pizzas..
January 10, 2011

math geometry ITT
All of the angles in a triangle total 180, so 180-40=140, 140/2=70
January 10, 2011

Math
2,300-2,500=?
January 9, 2011

7th Grade
Z+5/7=3 z=3-5/7 z=?
January 9, 2011

com170
Also: definitely, not defiantly lose, not loose
January 9, 2011

spanish
If you are struggling, maybe write it in English first, and then work on translating it to Spanish. You don't need "examples" of me telling you what I did last week. Just be sure that you understand when you need to use the preterite. If not, re-read that section...
January 8, 2011

english
Grammar mistakes: insure should be ensure (2 x), 4. I have learned that (not this) in life...at a quick glance the verb tenses appear to be correct, but they were not thorougly checked.
January 8, 2011

algebra
P + q for p = 32 and q = 18 5 P + q= ? 5 Should this say 5p+q? Not sure what the random 5 is there for. Either way, just plug in the numbers. If it is 5p+q, it's 5(32)+18. Find domain of the function g (x) = 10 4-7x, 4-7(10)
January 7, 2011

errors
-0.7x<-35 Divide both sides by -0.7. When you do this the sign flips. x>50
January 7, 2011

accounting
You have been asked to speak at a career fair for high school students in your home town. Specifically, you are making a presentation about your role as an accountant. Describe for the students the primary objectives of accounting. Explain the basic terminology of the ...
January 7, 2011

algebra
The slope is -3 and the y intercept is -5.
January 7, 2011

Algebra
Donna, almost all of your posts contain an equation or something similiar without a question. You have to tell us what the directions are. We aren't mind readers.
January 7, 2011

math
You're going to need to use a ruler. We can't help you online with this..
January 6, 2011

Math
8x+2y+11=0 2y=-8x-11 y=-8/2x-11/2
January 6, 2011

Math 208
x+3y=2 -x+y=1 so y=x+1, substitute that into the 1st x+3(x+1)=2 x+3x+3=2 4x+3=2 4x=-1 x=-1/4 Substitute that into either of the original equations to solve for y.
January 6, 2011

precal
Why is there no corresponding point on tan^-1(x) for the (135,-1) on the graph tan(x). Thanks!
January 6, 2011

7th grade math
6+x=2x-14 Letters on one side, numbers on the other. Subtract x from both sides. 6=x-14 Add 14 to both sides. 20=x
January 6, 2011

math
The lines mean absolute value. It means to make whatever is inside positive. |2|=2 |-2|=2 -|2|-2 -|-2|=-2 Get it? Always do the absolute value part first.
January 6, 2011

math
Jess is right, it's add. 5 * 3 = 15. 5 * 2 = 10 and 5 * 1 = 5, 10 + 5 = 15.
January 6, 2011

math
(3.5x10^-3)(4.2x10^7)
January 5, 2011

math
6(n+2)-(4-n)
January 5, 2011

english
It's a personification, because it gives the lake a human quality (being wrinkled).
January 4, 2011

math
No solution.
January 4, 2011

pre algebra
All of the whole numbers between -4 and 6, not including them since it's not <=. -3, -2, -1, 0, 1, 2, 3, 4, 5.
January 4, 2011

math
I'll do the first one. x+8>15 You want to get the letters on one side and numbers on the other. Subtract 8 from both sides. x>7
January 4, 2011

algebra 2
2x+5y=10 x-3y=-6 Multiply the 2nd equation by -2 so that the x's cancel. 2x+5y=10 -2x+6y=12 Add the lines together. 11y=22 Solve for y, replace that in either original equation to solve for x.
January 4, 2011

MATH PRE-ALGEBRA
It should be an open dot because it's an inequality. It would be a closed dot if it was an equality, such as x=3.
January 3, 2011

Algebra 1
It's not a solution. It would have to say x>=-4 for that to be true. -4 is not more than -4.
January 3, 2011

algebra
half
January 3, 2011

math
Perimeter means to add the sides. Pool A: 10+2+10+2 Pool B: 7+7+7+7 Which is more?
January 3, 2011

algebra
2x+7+14=2x+21
January 2, 2011

algebra
9(2)-4.5=?
January 2, 2011

Algebra
.5x+7<=1.3x-8 7<=.8x-8 15<=.8x 18.75<=x or x>=18.75
January 2, 2011

Math
Should that say x^2+8x+15? I think it should..
January 2, 2011

math
what is the inverse function of f(x)=3/x-4
January 2, 2011

integrated algebra
8y-11<5 or 13<4y-7 8y<16 or 20<4y y<2 or 5<y, y>5 so y<2 or y>5
January 2, 2011

algebra
never
January 2, 2011

geometry
All I can suggest to do is draw it. I got (-3,-2)..im sure it's something like that.
January 2, 2011

eng 20 F
Try searching No Fear, Shakespeare online. It's very helpful.
January 2, 2011

Social Studies
Louisiana
January 2, 2011

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