Sunday
April 20, 2014

Posts by Jen


Total # Posts: 3,253

Physics
A 15.0 kg box is released on a 32 degree incline and accelerates down the incline at 0.30m/s sqaured ? find the friction force impeding its motion. What is the coefficient of kinectic friction?

Physics
a force of 48.0N is required to start a 5.Okg box moving across a horizonatl concrete floor.what is the coefficient of static friction between the box and the floor?If the 48.0-N force continues, the box accelerates at 0.70 m/s squared . What is the coefficient of kinetic fric...

algebra
V=1/3*6300*7 solve for V The answer is V=14700 how do you change 1/3 to a decimal or use 1/3 to solve the equation?

math
A man borrows $50,000 towards the cost of a house. Compound interest is charge on the loan at 125 per annum. He agrees to pay back the loan in 25 equal installments, at yearly intervals, the first repayment being made exactly 1 year after the loan is taken out. Calculate the v...

TRIG
2sin@ + 3 = 2 2sin@ = -1 sin@ = -1/2 @ = 210, 330 convert to radians if desired

maths
let x be the number of green ones blue one = 6x

engineering physihcs
I need to create an Excel chart showing world oil reserves vs. time, which are both in columns and cannot find how to graph this in excel. thank you.

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?

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

algebra
5 1/3-3 5/6..make sure to change to common denominators

math
6 with 9 0's...6,000,000,000

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

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

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

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.

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 beg...

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.

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.

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

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

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

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.

Algebra
logx1/64=-3 Solve for x

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

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

Algebra
I figured it out.

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)=

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

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 y...

math
No, Raluca, it's 3:2.

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

math
What are the directions...?

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.

analogies
scripted? no idea..

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

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?

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

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.

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

Math Please Help
Thank You so much!

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.

Math Please Help
The answer cannot be in a radical form

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

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

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

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.

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

math
10 * 3 = ? Count by 10's three times.

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

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.

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,

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

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?

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

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?

Math
12:15

alegebra 2
What are the directions...

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 h...

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

chem
the gap between two brain cells is 0.0020 nm. how many meters is this

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.

English
1 is kind of awkward. I would change come to take.

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?

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

English
How do I write an outline for a paper?

Spanish
You have to post it first.

math
300 * 3 = 900

Math
They were different size pizzas..

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

Math
2,300-2,500=?

7th Grade
Z+5/7=3 z=3-5/7 z=?

com170
Also: definitely, not defiantly lose, not loose

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...

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.

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)

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

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 accounti...

algebra
The slope is -3 and the y intercept is -5.

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.

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

Math
8x+2y+11=0 2y=-8x-11 y=-8/2x-11/2

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.

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

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

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.

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

math
(3.5x10^-3)(4.2x10^7)

math
6(n+2)-(4-n)

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

math
No solution.

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.

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

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.

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.

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.

algebra
half

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

algebra
2x+7+14=2x+21

algebra
9(2)-4.5=?

Algebra
.5x+7<=1.3x-8 7<=.8x-8 15<=.8x 18.75<=x or x>=18.75

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