Friday
March 6, 2015

Posts by Samantha


Total # Posts: 1,379

algebra
Thank you sooo much!
January 7, 2009

algebra
Amy paid $62.18 for shoes during a 15% off sale. What was the regular price? $71.51 is this correct?
January 7, 2009

algebra
On 3 consecutive passes, a football team gains 5 yards, loses 28 yards, and gains 41 yards. What number represents the total net yardage? 5-28+41 18
January 7, 2009

Algebra
I am having problems figuring out some of my word problems for this week. Could someone check these? The equation y=-1777x+27,153 can be used to predict the number of gun deaths in the U. S. x years after 2000, that is, x=0 corresponds to 2000, x=2, corresponds with 2002, x=5...
January 7, 2009

math
yes so the answer would be 61 correct?
January 7, 2009

science-physics
All objects emit ______ radiation. Is it incident? The frequency of the radiation of most objects is a) below b) in the middle of c) greater than he frequency of the visibile light spectrum? I think its below as most objects can not be seen by visible light.
January 4, 2009

spanish
how do u say estoy in the yo form in the past
December 16, 2008

6th grade
I need help unscrambling these letters to form two words: inenidj tcain They go along with the phrase ______ _____and Persia.
December 15, 2008

math
A box contains 4 coins: a penny, a nickel, a dime, and a quarter. It costs a dime to reach in and take a coin. What is the expected value of this game?
December 12, 2008

spelling
grass:lawn::toss:? does anyone know the answer
December 9, 2008

Science
oh water thanks
December 2, 2008

Science
I can be three different states of matter, but not at the same time. I am necessary for life, but i can also destroy life. I can be under your feet, around your body, or over your head. What am I?
December 2, 2008

French
I had the duck story too :) We do these weekly but I like to get them checked when I do them in a hurry because I make twice as many mistakes! Merci Mme
December 2, 2008

French
Can someone check my paragraph please? Merci! It's about Thanksgiving :) Mes vacances sont passées assez ennuyeuses, alors j'ai inventé des nouvelles vacances! Le mercredi dernier, j'étais rentrée à la maison quand mes parents ont...
December 2, 2008

Physics
A uniform, spherical bowling ball of mass m and radius R is projected horizontally along the floor at an initial velocity v0 = 6.00 m/s. The ball is not rotating initially, so ω0 = 0. It picks up rotation due to (kinetic) friction as it initially slips along the &#...
November 19, 2008

Math Check
Yes thanks so much!
November 19, 2008

Math Check
is the 2nd equation 2x + 2y = 112 I don't get 4... I'm sure the 1st equation is x+y = 110 but I can't figure out the 2nd.
November 19, 2008

Math Check
Are the equations for these questions right? 1) Erik has 2 part-time summer jobs. For Job 1 he gets $9/hr on weekdays and for Job 2 he gets $12/hr for weekends. Last week he worked 23 hours and he earned a total of $231. How many hours did he work on the weekend? 9x+12y = 231 ...
November 19, 2008

Math
Kris is starting a delivery business in Ottawa called Kris' Speedy Express. He charges $5, plus $1.50/kg to deliver a package throughout all of Ottawa including all outside communities. His competition, John's Same Day Deliveries charges $6 per delivery plus $1.00/kg. ...
November 19, 2008

Australian History
Can someone please tell me the punishments onboard the first fleet to Australia?
November 19, 2008

Physics please help
Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?
November 17, 2008

Physics
Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?
November 17, 2008

Physics
Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?
November 17, 2008

Physics
Are you getting 5.28 J for the total energy?
November 14, 2008

Physics
Also for position I'm getting 0.145 when I use this equation => x = -.013 sin 34.6 t + .0640 cos 34.6 t
November 14, 2008

Physics
I don't get it. I'm getting x = 0. Is that supposed to be right?
November 14, 2008

Physics
A 215 g mass attached to a horizontal spring oscillates at a frequency of 5.50 Hz. At t=0s, the mass is at x= 6.40 cm and has vx =- 45.0 cm/s. Determine: a) The Maximum acceleration to 3 significant digits. - I calculated this to be 7.64 but it keeps saying I have the wrong SD...
November 14, 2008

Physics
The two blocks in the figureoscillate on a frictionless surface with a period of 1.5s. The upper block just begins to slip when the amplitude is increased to 38cm. What is the coefficient of static friction between the two blocks?
November 13, 2008

Physics
Suppose that one oscillation of a swinging lamp takes 5.5s. What maximum speed does the lamp have if its maximum angle from vertical is 3.0degrees? I first found L to be 7.51m. That was right. Now, I calculated the angular frequency of the pendulum to be 1.14. I'm pretty ...
November 13, 2008

science
what are some key characteristics of fungi?
November 11, 2008

math
350*(6/100) = 21 350+21 = $371
November 11, 2008

physics
Use 1 of your kinematic equations twice. vfinal^2 = vinitial^2 + 2ad. First you want to find the speed of the drag racer right when the parachute opens. vfinal^2 = vinitial^2 + 2ad. Substitute 0 for vinitial^2 and take the square root of 2(17)(402). That becomes your initial ...
November 11, 2008

Physics
There is no kinetic energy unless the object is oscillating.
November 11, 2008

Pre-Algebra
what?
November 9, 2008

Pre-Algebra
In a-c, explain what would happen to a figure if you transformed it using the given rule. a. (3x, 6y) b. (x+2, y+1) c. (2x, 2y +5)
November 9, 2008

Pre-Algebra
A rectange has dimensions of 1 and 6. Another rectangle was drawn from it using a scale factor of 1.5. A. The area of the large rectangle is how many times the area of the small rectangle? B. The perimter of the large rectangle is how many times the perimeter of the small ...
November 9, 2008

Physics Really Need Help Please
I found 583 for the first one which is right. I have no idea how to do the 2nd and 3d question please help!
November 7, 2008

Physics Really Need Help Please
At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular ...
November 7, 2008

Physics
I don't understand the question. What's the displacement for either of those parts? What equation should I use?
November 7, 2008

Physics
At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular ...
November 7, 2008

MATH
well i think that is called the y-intercept form
November 6, 2008

MATH
How do you write an equation in standard form? Ex.How would you write this in standard form? y+1=x+2
November 6, 2008

5th Grade student teacher: Needs ur help....
What fun activity could I use to to teach 5th grade students about the Constitution?
November 6, 2008

9th
6a+4 = -8 6a = -8-4 a = -12/6 a = -2
November 5, 2008

4th grade math
The sum of two numbers times a third number is equal to the sum of each added number times the third number. For example 4 * (6 + 3) = 4*6 + 4*3.
November 5, 2008

Calculus
Use the quotient law where you find the derivative of f(x)*g(x)-the derivative of g(x)*f(x) and the whole thing divided by g(x). (x+2)(x^3+x-2)' - (x+2)'(x^3+x-2) ---------------------------------- (x^3+x-2)^2 (x+2)(3x^2+1) - 1(x^3+x-2...
November 5, 2008

Damon
Thank you so much for all the calculus help! I felt more prepared for the exam!
November 5, 2008

Calc again sorry
4) The graph of y = (x)/(1+25x^2) for x is greater than or equal to 0 has a horizontal tangent at x = what. So what I did was find the first derivative. I did the quotient rule and ended up with x50x - 1+25x^2 --------------- (1+25x^2)^2 I equated that with 0 but I don't ...
November 5, 2008

Calculus
lim(x->infinity) sqrtx sin(1/sqrtx) Someone please start me off. I don't know how to find the limits of trigonometric functions.
November 5, 2008

Calculus
How do you do this question. f(x) = (5x-1)/(2-3x), find f^(-1)(x). The answer is supposed to be (1+2x)/(5+3x). -------------------------------------- And can you please explain this one to me. Suppose that xy^(3)+2y^(2)+xy+2x^(3) = 0. Find the general expression for dy/dx. ...
November 5, 2008

Calculus
Don't you have to do implicit differentiation?
November 5, 2008

Calculus - Damon
Thanks so much!
November 5, 2008

Calculus - Damon
Find the line which passes through the point (0, 1/4) and is tangent to the curve y=x^3 at some point. So I found the derivative which is 3x^2. Let (a, a3) be the point of tangency. 3x^2 = (a3 - 1/4)/(a-0) I'm not sure how to solve for a. Yes, the point is (0,1/4) but it&#...
November 5, 2008

Calculus part 3 so sorry
y = e^2xsin3x Find the derivative. So I used the product rule and I got sin3x(e^2x)+cos^3x(e^2x). But the actual answer is sin3x(2e^2x)+cos^3x(3e^2x) Where the the 2 and 3 before the e come from?
November 4, 2008

Calculus Part 2
y = tan(sqrtx) Find dy/dx. So I found it and I got the answer as sec^2(sqrtx) but the answer is (sec^2(sqrtx))/2(sqrtx)...why? ---------------------------------- 2) Find the line which passes through the point (0, 1/4) and is tangent to the curve y=x^3 at some point. So I ...
November 4, 2008

Calculus questions..really need help, please!
1) Find the value of the lim(x->0) ((sin5x/sin2x)-(sin3x-4x)). I have no idea where to start so if someone could start it off for me it would really help. 2) If f(x) = (2x-3)/(5x+4) then what's the inverse of f(x) So I replaced x with y x = (2y-3)/(5y-3) Now am I ...
November 4, 2008

Calculus
Can someone explain the method of implicit differentiation to me. I know that we differentiation both sides of the equation with respect to x (I don't understand what they mean by with respect to x). And then y is a function of x...I don't understand what that means. ...
November 3, 2008

Calculus
Can someone explain the method of implicit differentiation to me. I know that we differentiation both sides of the equation with respect to x (I don't understand what they mean by with respect to x). And then y is a function of x...I don't understand what that means. ...
November 3, 2008

Math
22 layers
October 27, 2008

Math
Edward H. White, the first astronaut to spend 20 minutes free-floating in space, had to wear a special suit to protect him from heat, radiation, and particles. the number of layers in his suit is the number that is the only palindrome between 12 and 30. how many layers did his...
October 27, 2008

Science
are u saying that miles are bigger than km
October 27, 2008

Science
Which of these rates of speed is the fastest? 40 km/h 28 mi/h 19 knots/h I believe it is 40 km/h am I correct?
October 27, 2008

Science PLEASE, PLEASE, PLEASE ANSWER DUE TOMORROW
My body is covered with bony plates, but i am a fish. I am male, but i take care of all my young. i can swim, but i prefer to be carried by ocean currents. i look like a familiar land animal. What am i?
October 22, 2008

Verb form " to be"
How can I introduce or teach 3rd graders how to use the Correct Verb Form of the verb "to be"? I want to tell them when to use the words: am, is, are, was, and were....
October 21, 2008

US history
ok thank you,, do you know the flaws of the anti federalist views???
October 20, 2008

US history
Do you know the flaws of the federalist views
October 20, 2008

US history
Do you know the flaws of the federalist views? haha sorry...
October 20, 2008

US history
What are the flaws of the federalist views thank you guys so much!
October 20, 2008

US history
What were the key points to the Federalist viewpoint? Flaws?
October 20, 2008

US history
what/who did the antifederalists support? (what is diff. from them and the federalist beliefs)
October 20, 2008

US History
Was there anyone missing from the constitutional convention and if so who was missing from the constitutional convention? I didnt know some people were missing. Can some explain this?
October 20, 2008

Biology
What is 8 characteristics of animals?
October 16, 2008

11th grade
1. Bruce, an appliance salesman, earns a commission of $50 for each washing machine he sells and $100 for each refrigerator. Last month he earned $500 in commissions. Find all possibilities for the number of each kind of appliance he could have sold. 2. Luis has 95 cents in ...
October 15, 2008

7th grade
Maybe just comparing the differences of the elements?
October 9, 2008

math problem
on monday Sheldon brewed 1 bottle of tonic, on tuesday he brewed 4 bottles, wednesday he brewed 9 and thursday 16. How many bottles did he brew on friday? Is it 30?? I'm 10 years old thanks
October 9, 2008

Math question
Thank you very much. Sorry
October 9, 2008

Math question
I don't understand your answer?
October 9, 2008

Math question
on monday Sheldon brewed 1 bottle of tonic, on tuesday he brewed 4 bottles, wednesday he brewed 9 and thursday 16. How many bottles did he brew on friday? Is it 30?? I'm 10 years old thanks
October 9, 2008

math
on monday he brewed i bottle of tonic tuesday he brewed 4 bottles, wed he brewed 9 and thursday 16. how many bottles did he brew on friday?
October 9, 2008

6th grade
How can you make an input output division chart
October 8, 2008

Math
1808
October 7, 2008

Math
Jefferson Davis, President of the Confederate States of America, lived a square number of years. he died in 1889. The digits of the year in which he was born sum to 17. When was Jefferson Davis Born.
October 7, 2008

Science
Javier lives in an area where there is a lot of igneous rock. What is probably near by.
October 7, 2008

Science
I do not have shape or volume. You cannot see me, but i fill any container in which i am placed. I have weight, but you cannot hold me.What am I? Is it air?
October 7, 2008

Math
By how many degrees Fahrenheit do the frezzing point and the boiling point of water differ?
October 7, 2008

Science
I can live in both fresh water and salt water. When full grown, I migrate long distaces to my place of birth. What am I?
October 7, 2008

PreCalculus
Thanks! I didn't realize it could be so easy!
October 6, 2008

PreCalculus
I'm so confused... I've always been good at math but this year I'm just not getting it. But I know i can I always get help and a REAL explanation from the people on here so... A steel drum in the shape of a right circular cylinder required to have a volume of 100 ...
October 6, 2008

Science
Cells make tissue and tissue makes what?
October 5, 2008

math
Without actually graphing it, show that the graph of the equation x^3+y=x is symmetric with respect to the origin
October 2, 2008

Pre Calc
Without actually graphing it, show that the graph of the equation x^3+y=x is symmetric with respect to the origin.
October 2, 2008

Pre Calc
simplify the expression x-4 when x is less than 4
October 2, 2008

Science
Whats an example and non-example for cardiac muscle? Thanks again
September 30, 2008

Science
Whats a characterisic for axial skeleton? Thanks
September 30, 2008

Science
Whats an example and non-example of an axial skeleton?
September 30, 2008

supposed to be math
how many u.s. patents did Thomas Edison have? The number is 93 more than the number of pounds in half a ton. so basically i just need to know how many pounds are in half a ton
September 30, 2008

fifth grade
where can light travel, but not sound?
September 30, 2008

fifth grade
thanks
September 30, 2008

fifth grade
how many grams in a lb.
September 30, 2008

science
thanks
September 30, 2008

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