Saturday
August 30, 2014

Posts by ANON


Total # Posts: 1,340

Math
Jason has to sell a box of candy bars for a fundraiser. Yesterday he sold 1/3 of the total number of candy bars that came in the box, and today he sold 3 candy bars. If his sales for these two days was 11/30 of the total number of candy bars that came in the box, how many ...
July 21, 2013

Stats
A pizza parlor has 13 different toppings available for its pizzas, and 2 of these toppings are pepperoni and anchovies. If a customer picks 2 toppings at random, find the probability that pepperoni is one of the toppings. Round to four decimal places.
July 17, 2013

AP Calc
Solve the following absolute value inequalities: |x+1|<=|x-3| I promise I'm not posting my whole homework assignment. These are questions that I skipped and have no clue how to do out of a huge packet.
July 12, 2013

AP Calc.
ohmygosh.. i'm an idiot.. thank you! you're the bestt!(:
July 12, 2013

AP Calc.
How did you go from the original question to the 1st step?
July 12, 2013

AP Calc.
but don't you have to get rid of the negative exponents somehow..?
July 12, 2013

AP Calc.
I don't get it...
July 12, 2013

AP Calc.
Simplify: [(x^-3)-x]/[(x^-2)-1]
July 12, 2013

AP Calculus
Got it. Thanks lol
July 12, 2013

AP Calculus
Wait.. does it matter if it's f(x) or f(y)?
July 12, 2013

AP Calculus
okay thank youu so much. This is a summer review packet before calculus and I don't remember how to do any of this!
July 12, 2013

AP Calculus
If f(-x) = f(x), the function is even. If f(-x) = -f(x), the function is odd. If neither is true, the answer is neither.
July 12, 2013

AP Calculus
Show work to determine if the relation is even, odd, or neither. 1. 3x=|y| (|y|=abs. value of y) Simplify the following complex fractions. 2. [(3/x)-(4/y)]/[(4/x)-(3/y)] PLEASE HELP!
July 12, 2013

AP Calculus
Oops.. thankyou haha
July 12, 2013

AP Calculus
I'm suppose to simplify it, but I keep getting 3y-4x/4y-3x. Can you please show me how to do it?!
July 12, 2013

AP Calculus
[(3/x)-(4/y)]/[(4/x)-(3/y)]
July 12, 2013

Science
Female silkworm moths (Bombyx mori) attract males by emitting chemical signals that spread through the air. A male hundreds of meters away can detect these molecules and fly toward their source. The sensory organs responsible for this behavior are the comblike antennae visible...
July 3, 2013

Science
If you were a pharmaceutical researcher, why would you want to learn the three dimensional shapes of naturally occurring signaling molecules?
July 3, 2013

math
If you are trying to find the area of the triangle you could use trig to find the height of the triangle and then use the formula 1/2 base x height. So draw the Isoceles triangle with each leg 3cm and the base 4cm Draw a centre line forming two right angled triangles find the ...
June 26, 2013

Science
x-t graph is a displacement vs time graph..right? so you would have a vertical axis as you displacement (distance) and a horizontal axis as the time (in seconds). uniform acceleration means an object moves with a change in velocity that is equal in amount. velocity is a change...
June 17, 2013

Change of subject formular
in y = x-8, the subject is y. to change that is to make x the subject i.e. the equation must become x = .... here are the few rules to consider; 1. change the sign of the variable when you move it to the other side of the equation. 2. the subject must always be isolated on the...
June 17, 2013

Chemistry
that strange!! the amount of heat evolved for a particular substance is Q = mc?T where m is the mass of that substance c is the specific heat capacity and ?T is the change in temperature during transition change or reaction. So as the mass increased so the Q as well.
June 17, 2013

Physics
I think its possible. How can the toy cars are controlled with a controller? isn't that an example of electricity been carried through air? If not then am wrong.
June 17, 2013

Grammar
I'm sending an email to my teacher. and I wanna know how to send it like the correct way. Hi Miss rodriguez I wanted to know what's my score for reading they still haven't posted it on the portal
June 11, 2013

Physics
The velocity of a vehicle is uniformly reduced from 72km/h to 24km/ over a distance of 250m down a decline of 1:25 the mass of the vehicle is 1.5Mg and its tractive resistance is 400N. The retardation is uniform. Calculate the total constant braking force required so I found ...
June 3, 2013

geometery
one could say 8/3 = 12/height h(8/3) = 12 h = (12x3)/8 h = 4.5 or use trigonometry and say sinX= 3/8 X = (1/sin)3/8 X = 22.02 which is the angle of the incline so sin(22.02) = h/12 12sin(22.02) = 4.5
June 3, 2013

Chemistry
a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at...
June 2, 2013

Chemistry
For each pair of structures shown below, indicate whether the two species are identical molecules, enantiomers, or isomers of some other sort.
June 2, 2013

Chemistry
a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at...
June 2, 2013

Chemistry
At very low temperatures the carrier concentration in one of these materials appears to diminish very rapidly. Why is this? Please choose the option that BEST describes this phenomenon.
June 1, 2013

Maths
Hi I think this is how it should be done, not completely sure please check other scources as well For this question to be answered at least a basic shape is required, is it a rectangle, is it a circle. The optimisation of the perimeter of a rectangle or square could be found ...
June 1, 2013

math
the rule of fractions is when you add or subtract you need to make the denominators the same 2/3 +3/5 becomes (2x5)/(3x5)+ (3x3)/(5x3) =10/15+9/15 now add the numerators 19/15 5/6 - 3/4 =10/12-9/12 =1/12 with multiplication just multiply both top and bottom 3/5 x 2/5 = 6/25 ...
June 1, 2013

chemistry
Scratch what i just said out. also, out of the choices provided, which one is closest to 'trigonal pyramidal', because it definitely isn't trigonal planar.
June 1, 2013

chemistry
It's Tetrahedral, the others i don't know.
June 1, 2013

Chemistry
Nope. just checked. though there might be a third correct answer...
May 31, 2013

chemistry
it's wrong. why is it wrong?
May 31, 2013

chemistry
THEN HOW DO YOU DO A)?
May 31, 2013

Math
Create a 3rd degree polynomial with real coefficients that has roots -1 and 4i. Write your answer in form ax^3 + bx^2 + cx+ d .
May 24, 2013

Math
Create a 3rd degree polynomial with real coefficients that has roots -1 and 4i. Write your answer in form ax^3 + bx^2 + cx+ .
May 24, 2013

Science
Explain if quadruplets-four babies born at one birth are always identical or always fraternal, or if they can be either.
May 23, 2013

Engineering
Please post the answers for 1_4 and 1_5
May 23, 2013

Civil War
What book caused many people in the north to look at slavery as a moral issue?
May 21, 2013

Civil War
The Fugitive Slave Law was criticized because it
May 21, 2013

algebra
1) how many billions of years will it take 1000 grams of uranium-238 to decay to just 125 grams? 2) a researcher had 37.5 g left from a 600 g sample of sulfer-35. how many half-lives passed during that time? 3) look at problem 2. how many days passed during that time?
May 9, 2013

algebra
a number cube is rolled 2 times in a row. what is the probability of rolling a number greater than 2 both times?
May 7, 2013

Pre calc
Projectiles are always parabolas
May 6, 2013

physics
A meter stick is suspended vertically at a pivot point 27 cm from the top end. It is rotated on the pivot until it is horizontal and then released from rest. What will be its maximum angular velocity (in radians/second)?
May 6, 2013

physics
While waiting to board a helicopter, you notice that the rotor's motion changed from 340 rev/min to 265 rev/min in one minute. Assuming that this acceleration remains constant, calculate how much longer (in seconds) it will take for the rotor to stop.
May 6, 2013

Algebra 1
(-2+x) (1+2x)
May 6, 2013

Function
Write a function rule for the area of a parallelogram whose base is 4 inches more than its height. What is the area of the parallelogram when its height is 8 inches?
May 6, 2013

Function
Fahrenheit and Celsius are two measures of temperature. The temperature in degrees Celsius is equal to five ninths of 32 less than the temperature in degrees Fahrenheit. What is a function rule that represents this situation?
May 6, 2013

Functions?
find the range of f(x) = -2x+6 for the domain {-1,3,7,9}
May 6, 2013

Chemistry
n is the moles of No
May 6, 2013

Chemistry
use your ideal gas formula, but first find the limiting reagent to find the moles of NO. Then to find volume V=(nRT)/P assume pressure to be one and temperature to be 273K R is the constant .08206. Hoped it helped. The total volume is 12.50+20 (this is true because of the law ...
May 6, 2013

Physics Plz help me
5.98x10^6
May 6, 2013

Math
Larry is 74 inches tall and his shadow is 70 inches long. At what degree is the elevation is the sun?
May 4, 2013

algebra
Beginning with cars made in 1981, all vehicles must contain a 17-digit Vehicle Identification Number (VIN). The first 3 positions must be letters or numbers, position 4 and 5 must be letters, positions 6 and 7 must be numbers, position 8 can be a letter or a number, position 9...
May 2, 2013

social studies
again with the articles haha "An article on Abraham Lincoln's rise to the presidency (this should NOT be about his presidency but what he had to do to become president and his struggles to become one)"
April 29, 2013

social studies
I'm doing a project and I need a atricle on John Brown. (Like Who was he? What did he do? What happened to him? Do I agree? and why? but I'm looking for a article and don't find one
April 29, 2013

Algebra
Find an equation for the line with y-intercept 3 that is perpendicular to the line 3y=2x-4. A. 2y=6-3x B. 2y=3x+6 C. 3y=9-2x D. 3y=2x+9
April 29, 2013

Algebra
(4x^2-2x+8) - (x^2+3x-2)=
April 29, 2013

Chemistry
Thanks.
April 27, 2013

Chemistry
Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO Quench the entire sample in water Quench half of the sample in water Cool the entire sample with air jets Cool half the sample with air Submerge the sample in a salt bath of Na2O Submerge the ...
April 27, 2013

chemistry
Correction, it's right. WHY it is right though, that is the question. After all, who would want to know how to do a similar question where internet access is disallowed? Anyone who hasn't just stumbled onto the question, or already knows how, that's who.
April 26, 2013

chemistry
it's wrong....
April 26, 2013

Physics
X10 are done now
April 26, 2013

Physics
you need to make sure you use the right value for I
April 26, 2013

Physics
yes i did and i also said you need to use mu/4pi
April 26, 2013

Physics
(I*10^(-7))/(2*(z-R))
April 26, 2013

Physics
mu = 4pi * 10^(-7)
April 26, 2013

Physics
yes but you need mu/4pi
April 26, 2013

Physics
correct
April 26, 2013

Physics
you are missing the current I in b
April 26, 2013

Physics
yes it is good
April 26, 2013

Physics
You should be using mu/4pi for answer in b
April 26, 2013

chemistry
Quench the entire sample in water Quench half of the sample in water Cool the entire sample with air jets Cool half the sample with air Submerge the sample in a salt bath of Na2O Submerge the sample in a salt bath of CaO
April 26, 2013

Chemistry
Calculate the density of atoms on plane (001) in Lithium
April 26, 2013

chemistry
Am i the only one to make the obvious question here? If we knew how we got the answer, we could spot a mistake that might have been overlooked this entire time. How did we get the answer?
April 26, 2013

Physics :(( help please TT
Where is the picture?
April 23, 2013

physics
last option
April 19, 2013

First-Year Physics
Question: s22.postimg[dot]org/comasgagh/untitled.png From my calculations, option A is correct. What am I doing wrong? Also, I can't find a relationship between amplitude and energy. Attempt: s9.postimg[dot]org/8shnsrjbj/daum_equation_1366155192269.png
April 16, 2013

social studies?
Before the invention of the cotton gin, how were seeds removed from cotton fiber?
April 16, 2013

Quantum Physics
Please Q 7 and 8!
April 16, 2013

Quantum Physics
WORKING ON IT AR . DISTRACTED BY SOME PERSONAL PROBLEMS IN LIFE ... NOT ABLE TO CONCENTRATE
April 16, 2013

Quantum Physics
the above answers to 5th question is of assignment 6 problem 5 dont get misguided
April 16, 2013

Quantum Physics
problem 5,7 please.
April 16, 2013

Quantum Physics
I meant answer to question 1 is part c. -z-h- -x-h-
April 16, 2013

Quantum Physics
3B is Z
April 16, 2013

Quantum Physics
1st is part c): -z-h- -x-h-
April 16, 2013

algebra
in the past professional baseball was played at the astrodome in Houston, Texas. the astrodome has a maximum height of 63.4 m. the height of a baseball t seconds after it is hit straight up in the air with a velocity of 45 ft/s is given by h = -9.8t + 45t + 1. will a baseball ...
April 11, 2013

History
What are some of the toughest hardships that emigrants faced along the oregon trail?
April 9, 2013

History
Why did people move west in the 1800s?
April 9, 2013

algebra
solve for x: x-18 =64
April 8, 2013

Years ?
"In the early 1930s" what years are those like 1900-1930 right?
April 8, 2013

Reading/Maps
This is what I have to do "Draw a map of mainland U.S.A. and show (draw)how the mississippi river divides the country (part of the labeling) and label both sides correctly." I was wondering if you can find me a map that way I can start it off like how exactly do I do...
April 8, 2013

Science
what should you consider when you plan a title for a graph?
April 7, 2013

um math
what does a circle graph show that a bar graph does not?
April 7, 2013

science asap
Air pressure decreases as altitude increases ^ which one goes on the horizontal axis and which one goes vertical axis? how did you choose this scale? (This is for a line graph)
April 7, 2013

writing
how can i reword this differently Free will is God’s indispensable gift to humanity, and we must allow ourselves to be open to salvation in light of the choices we make.
April 6, 2013

math
-5 and 5/2 are both correct answers
April 4, 2013

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