# Posts by Kelly

Total # Posts: 1,794

Algebra

Algebra
Find all the numbers for which the rational expression is undefined: -24/25v

Algebra

Algebra-Undefined
Find all numbers for which the rational expression is undefined: -24/25v

Algebra-Rational Equation
4/vy^2+9/v^2y

Algebra-Solve
x/x+3-3/x-3=x^2+9/x^2-9

Algebra/Time
The officejet printer can copy Lisa's dissertation in 22 min. The laserjet printer can copy the same document in 18 min. If the two machines work together, how long would they take to print the document?

Algebra-km/h
Maria bicycles 4km/h faster than Javier. In the same time that it takes Javier to bike 60km, Maria bikes 72km. How fast does each bicyclist travel?

Algebra/Math
A group of parents is going to sell specialty coffee drinks including espresso, lattes, cappuccinos and mochas. It cost \$250 to rent the equipment, which is a fixed cost. Additionally, the ingredients for each drink (x) cost \$0.25. Write an equation that shows the total cost ...

physics
a fire hose held near the ground shoots water at a speed of 6.5m/s at what angle should the ozzle point in order that the water land 2.5m away? why are there two different angles?

chemistry
0.15g CS2

english
okay one more to be sure I got it. May Beth and ____ help with the decorations? She can go here because it is the subject and I need a subject pronoun??

English
It is confusing me when it is at the end of the sentence... Amelia Earhart also flew nonstop across the Atlantic; the first woman to do so was (her, she). I am thinking try the sentence with one word at a time to see which makes sense.. so I am thinking she?

english
him

english
What word is the correct one and why? When Samuel P. Langley built a steam-powered airplane, both the pilot and (he, him) were sure to fly.

english
Which word fits better and why? You and (me, I) have heard the Greek myth about lcarus.

Physics
A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 8.5 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

physics
A shell is fired from a gun with a muzzle velocity of 466m/s at an angle of 57.4 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically...

statistics
The sum of the draws from a box is 440. If the average of these draws is 2.20, how many draws were there?

Algebra
You need to solve for x, so start by getting x by itself. To do that, move the 8 to the other side of the equation by subtracting it from both sides. When you do that, you get: 3x>-6 Then, to get x by itself, divide both sides by 3. So you're answer will be: x>-2

Calculus
Find dy/dx by implicit differentation. ysin(x^2)=-xsin(y^2)

math
First distribute the 5: 5(3x-2y)-(x+6y) will become (15x-10y) -(x+6y) Then, distribute the - on the (x+6y): 15x-10y-x-6y Then, just combine the x's and y's and you'll end up with: 14x-16y

Math
2(6-4d)= 25-9d plz show step by step

communication

communication
What are some froms of medium in popular culture?

math
lopez spent 1/3 of his vacation money for travel and 2/5 of his vacation money for lodging. He spent \$1100 for travel and lodging. What is the total amount of money he spent on his vacation?

math
9x+6-4x=8 ---------- 2

english
Music or television I meant

english
Music of television

english
what are some research topics about popular culture

Calculus

Calculus

physics
An electron travels 3.75 m in 6.41 × 10−8 s. How fast does it travel? Answer in units of cm/s

English 101
What are some interesting topic regarding Pop Culture. Any ideas for my research paper.

physics
A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50. What is the magnitude of the frictional force that acts on the block

Melvin estimated 645 + 322 by adding 600 + 300. Is his estimated sum an over or under estimate? Ty

Math
Melvin estimate 645 + 322 by adding 600 + 300. Is his estimate sum an over or under estimate please? Ty

Math
i need help with my math

bio 12
you have an orginal populatonof eagles, then humans introduce new eagles in the same area. the new eagles reduce the amountof resources in its home range. what type ofdistrubtion would give the most accuarte assesment of sustainable maximum popualtion. the three type of ...

physics
Find the density in g/cm3 of a 120 cm3 piece of metal having a mass of 2 kg.

chemistry
Find the concentration of Cu+ in equilibrium with CuBr(s) and 0.10 M Br-.

grammar
i need help making sure my daughters paragraph is puntuated correctly

math
Hello, Please help with the below question. write three numbers that are greater than 1,543,000 and less than 1,544,000 Thanks!

physics
given that the total mass of the plasric cup,heater and thermometer is 350g, determine the heat capacity of liquid x. hetaer heater the liquid with 20W.

english
Is this a run on or complete sentence? The desert is very hot during the day, the temperature in the desert may drop below freezing at night.

chemistry
a 100.00 mL sample of water has an initial temperature of 20.0 degrees C. The water is heated, and after 5 minutes its temperature is 50 degrees C. approximately how much energy was absorbed by the water? (the specific heat of wter is 4.18 J/g. degrees C

Math 116
Justin had \$49 before spending n dollars on Jeans. How much money remains? Translate to an algebraic expression

Calculus
sif xyz=0 (-3x^2yz)^3 p=27x^7y^4z^6 then p=?

math
If all of the following operations are present in math calculation which of them should always be done first??

single variable calculus - indefinite integrals
Oh! I didn't realize it was so simple. Thank you!

single variable calculus - indefinite integrals
integral of (1-(sinx)^2))/(cosx)dx i don't know what to make my "u" for u-substitution

Single Variable Calculus
sorry, I typed the answer wrong. Can you please check this answer? lim as x-> infinity of sigma from i=2 to n of ((2+3i/n^2+(2+3i/n))(3/n)

Single Variable Calculus
find an expression for the area under the graph of f(x)= (x^2)+x from x=2 to x=5 as a limit of a riemann sum (do not need to evaluate). the answer i got was: lim as x-> infinity of sigma from i=2 to n of (2+3i/n)^2+(3i/n)(3/n) is this correct?

Could you please help me re write the sentences below. Media convergence is the merging of mass communications outlets such as television, radio and the Internet along with portable and interactive technologies though various digital presentation platforms. Media convergence ...

I could not find her other post. I did read it aloud and to me it sounds good, but that is probably because I have read it over and over again for an hour.

Could you please help me re word my paragrah? It needs to be at least 100 words. Media convergence is the merging of mass communications outlets such as television, radio and the Internet along with portable and interactive technologies though various digital presentation ...

Media
Could you please help me re word my paragrah? It needs to be at least 100 words. Media convergence is the merging of mass communications outlets such as television, radio and the Internet along with portable and interactive technologies though various digital presentation ...

HUM
Could you please help me re word my paragrah? It needs to be at least 100 words. Media convergence is the merging of mass communications outlets such as television, radio and the Internet along with portable and interactive technologies though various digital presentation ...

HUM
I did not understand this part of my class so here is the question What is media convergence? Provide an example of media convergence and explain the media elements that are being combined. Explain how the combination of media elements in your example may be useful and to whom...

HUM
Could you please help me re word this paragraph. I need it to be at least 100 words, but this one that I did was not good enough. Social media sites have affected commerce because people can advertise to thousands of people all at once through different sites. Social media ...

HUM
I have done all of this and the above paragraph is what I came up with, but to me it still does not look right. This is my own work and I have already sent it through plagiarism and it came back with 3%. Now I am needing someone's help.

HUM
Can you help me re do this paragraph that I did. I keep looking over it an am not happy but can not think of anyway to change it. Convergence in the context of media refers to the technology driven unification of different media channels. Media convergence allows mass media ...

HUM
COuld you please help me re word this sentence- Social media sites have affected commerce because people can advertise to thousands of people all at once through different sites.

math
How do you simplify 4w(9)? would it be 36w?

algebra
can somebody help me out? am I doing this right? using the elimination method. y = 3x + 2 2y-6x=4 We have the solution for y so we use this to solve 2 (3x + 2) – 6x = 4 6x + 4 – 6x = 4 0x +4 = 4 Subtract 4 from both sides X=0 Now we use 0 for the x value in equation ...

physics
An extreme skier, starting from rest, coasts down a mountain slope that makes an angle 25.0° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.200. She coasts for a distance of 13.8 m before coming to the edge of a cliff. Without ...

Chemistry
What volume of liquid water is produced from the combustion of 10.00 L of octane, C8H18? (density of octane=0.692 g/mL

algebra
In 1920 the record for a certain race was 46.5 seconds. in 1980 it was 45.3 seconds let R(t) = the record in the race and t=the number of years since 1920 R(t) = 46.5 - t*0.02 what is the predicted record in 2003? 44.84 what is the predicted record in 2006?44.78 what year will...

us history
what were some tension over slavery in the 1840's?

algebra
Please help me find the domain for the following functions. If I understand this correctly I can use any number as long as the denominator does not equal zero 1) y = 7/(1 +x) can be any number except -1 2) y = -2/(6- x) can be any number except -6 3) y = 8/(2x - 1)can be any ...

algebra
Please help f(x) = 3x² + 2 x= 3 my question, do I start by solving x² first then multiply by 3 and adding 2 f(3= 3 * 9 + 2 = 29 or do I multiply first 3*3 =9² +2 = 83 I'm pretty sure we resolve the exponents first but need some help

algebra
Damon, thanks for your help, sorry the ">"is a typo on my part. the quation is y = 3x +5 Again that you for your help

algebra
Y= 3x+5> Is this equation a function? I believe it is but I am confused, My understanding of functions is that regardless of what number I use for x, as long as I get one answer for y it is a function

Com
Ok thank you. I was just wanting a "second eye" to look over it.

Com
Is there a way to submit an essay for review without someone being able to copy it??

chemisry
If you have 32g of NH3 how many moles of NH3 is that?

statistics
IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual is randomly chosen. Let X = IQ of an individual. The middle 30% of IQs fall between what two values?

physics
A golfer takes three putts to get her ball into the hole once she is on the green. Her first putt displaces the ball 71.0 ft north; the second, 6.0 ft, 45 degrees south of east; and the third, 3.0 ft, 45 degrees south of west. What is the magnitude of the displacement (in feet...

pre calculous
solve each equation algebraically and check it by substituing into the orignall equation. 50e^0.035x=200 3LN(x-3)+4=5 Method of your choice by solving. logx^2=6 Logx^4=2 2x-2^-x/2=4 e^x+e^-x/2=4 500/1+25e^.3x=200

History
Well this site is no help. Thanks, found a better one!

History
What do you think is the most significant thing to learn about the differences between social, political and economic systems in the world?

A 20 ounce bag of popcorn costs \$2.80 at the movie theater, if the unit price remains the same, how much would a 35 ounce bag cost ? Please help me, I'm in math class and Im stuck.

Statistics
Employees in a large computer firm claim that the mean salary of the firm’s programmers is less than that of its competitors. The competitor’s salary is \$47,000. A random sample of 30 of the firm’s programmers has a mean salary of \$46,500 with a standard ...

maths
simn spent 2/5 of his pocket money on a computer game he spent 25% of his money on a ticket for a football match what is the fraction of his pocket money that he had left

geometry
given that a/b=c/d, decide whether it is true or not that a/c=b/d.

geometry
26

Math
log2(x)- log2(7) does this equal 1?

pre-calculus
what is the F-^1 of 6/x+4

Math
Sorry if this is not the answer , thank you !! it helps me sooo much !!

Chemistry
oh my work wasn't entered correctly. the 0.5 M, 2nd +s, and 0.5+s should be under Ba+

Chemistry
How many grams of BaCO3 will dissolve in 3.0 L of water containing a Ba+2 concentration of 0.5 M (Ksp= 5.1E-9) My work: BaCO3 <-> Ba+ + CO3- i 0.5 M c -s +s +s e 0.5 +s +s (s)(0.5+s)= 5.1E-9 s= 1.0E-9mol/L x 3.0 L x 197.336 g/L= 5.92E-6 grams of BaCO3 dissolved ^Is this ...

Physics
Two students are on a balcony 19.6 m above the street. One student throws a ball (ball 1) vertically downward at 15.8 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the balcony on the way down...

Chemistry
How do I take into account the change in volume?

Chemistry
Calculate the pH of the 0.20 M NH3/0.20 M NH4Cl buffer. What is the pH of the buffer after the addition of 10.0 mL of 0.10 M HCl to 65.0 mL of the buffer?

biology
Discuss possible benefits and drawbacks of a transgenic organism such as Bt corn?

chemistry
In the chemical equation wA+ xB-> yC+zD, a comparison of the number of moles of A to the number of moles of C would be a?

Math
A pond 100 ft in diameter is surrounded by a circular grass walk 2 feet wide. Find the are of the walk. Answer in terms of π. Please help me! TY

Earth Science
Which of the following layers of the atmosphere is closest to the ground?

earth
Atmosphere Homework! 1.Which of the following layers of the atmosphere is closest to space? 2.A barometer measures? 3. The atmosphere contains tiny solid particles called what? 4.The process by which the atmosphere slows Earth's loss of heat to space is called the ..? 5....