Tuesday
April 28, 2015

Posts by kate


Total # Posts: 1,761

math- check me
no. First multiply both sides by 5y, giving you -3=-45y, then divide by -45 -3/-45 = y this reduces to 1/15
February 15, 2011

6th grade math
The only figure similar to a square is another square. If the side of the square is 5cm, then the area is length times width, which would be 5 * 5 since all sides of a square are equal. So what's 5 * 5?? And don't forget to write cm squared after.
February 15, 2011

algebra 2
First add 15 to both sides to get all terms on one side of the equal side and a zero on the other: a^2-8a+15=0 Then set up your parentheses. ( )( )=0 Now ask yourself, what two things multiplied together = a^2? a*a So put one of each in the first place in the parentheses. (a...
February 15, 2011

alg readiness
A mixed number looks something like 3 1/2, read "3 and one half." Writing that as addition would be 3 + 1/2. To write it as a single fraction, you need to change it into an improper fraction by multiplying the denominator (2) by the whole number (3) and then adding ...
February 15, 2011

Math
Not necessarily. Only if it's a rectangle. But a rectangle is a more specific parallelogram.
February 15, 2011

algebra
Try using parentheses and the / sign for division when you type your question. I can't really understand what's going on here.
February 15, 2011

algebra
I would imagine it would read the average of the two weights: (60+43)/2 = 103/2=51.5 pounds.
February 15, 2011

math
If you received a $10 reward, then you spent between $50 and $99.99 If you received a $20 reward, then you could have spent $100, $125, or $149.99. If your purchase is $98, then you'd be better off spending $2 more, so that you'll get another $10 gift card. That would ...
February 15, 2011

Math Correct?
Yes. Since all the angles of a square are 90 degrees, two of them will always add to 180 degrees, which is the definition of supplementary.
February 15, 2011

alg
Sorry, silly error... 5y=25 y=5 (1,5)
February 15, 2011

alg
(9x+5y)=34 (8x-2y)=-2 You need to eliminate a variable so first pick either x or y to eliminate. I'll choose y. To eliminate y from the equations, you need to multiply by numbers that will give you zero y when you add the equations together: 2(9x+5y)=34*2 5(8x-2y)=-2*5 18x...
February 15, 2011

math
out=-25+25=0
February 15, 2011

college psychology
it effects the temporal lobe of the cerebral cortex
February 15, 2011

college psychology
What areas of the brain are affected and how are they affected with sleep deprivation?
February 15, 2011

algebra
Well, what I wrote would be considered the appropriate work shown.
February 15, 2011

algebra
You really should write a linear equation: You're right on calculating the rate. It is 4. You can also call that the slope of the line. In y=mx+b form, y=4x+b Since you started at 11 in 2006, 11 is your y-intercept (b) y=4x+11 Again, since you started at 2006, 2011 is 5 ...
February 15, 2011

algebra
What exactly is the question? If you have to solve the inequality, then you would subtract 2.2 from both sides, leaving you with: x<2.3
February 15, 2011

Calculus
The Product Rule is: (First*Derivative of Second)+(Second*Derivative of First) In your case: First is (x^3-2x) and Second is (5x^2+2x) Try that and write back if you're still having trouble.
February 15, 2011

Pre-Algebra
Yes they are all correct.
February 15, 2011

geometry
Ratios are usually good to set up like this: 4x+7x+5x=64 in this case. 4x = the shortest side, 7x = the longest side, and 5x = the middle side. Then solve for x. 16x+64 x=4 Then plug 4 back in for x to see what the individual side lengths are. 4*4=16 for the shortest side.
February 15, 2011

algebra
Substitute 2 in the inequality and see if the sentence is true. 4(2)+8<12 8+8<12 16<12 False, so 2 is not a solution. Do it again with 0 and see what happens. If need more help write back.
February 15, 2011

Discrete Math
Domain is correct. Range is all real numbers except 5. Since 1/(1+x) can never be 0, the equation will never be 5. Write back if you still have questions.
February 15, 2011

math
This question does not make sense, given that 2/5 + 3/4 = more than 1. Is there more information to this question?
February 14, 2011

math
Let x = number of gallons of %5 milk 0.05x + 0.01(100) = 0.02(x+100) 0.05x + 1 = 0.02(x+100) 0.05x + 1 = 0.02x + 2 0.03x = 1 x = 33 and 1/3 Write back if you need more explanation
February 14, 2011

8th Grade Algebra
In a standard deck there are 13 hearts and 4 aces. However one the hearts is an ace. So we're talking 13+4=17 cards, but then subtract one (16) for the ace of hearts that would be repeated if counting the hearts and aces separately. So 16/52 is the probability. This can be...
February 14, 2011

math
A=P(1+r)^t A=amount of money at end P=amount of money to start r=interest rate as a decimal t=number of years 20000=P(1+.05)^5 20000=P(1.05^5) 20000/(1.05^5)=P $15670.52=P
February 14, 2011

8th grade Algebra
(5/100)*(5/100)=25/10000=0.0025 or .25%
February 14, 2011

math
The center of the rectangle is equidistant from each vertex. If you make the center of your circle the center of the rectangle, then the four vertices of the rectangle will be equidistant from the center of the circle as well, making each distance from the vertex of the ...
February 14, 2011

math
Substitute -12 in for x in the above equation and solve for y. 6y+5(-12)=15 6y-60=15 simplifying 6y=75 adding 60 to both sides y=12.5 dividing both side by 6. k=12.5
February 14, 2011

Math
A circular tablecloth is draped over a rectangular table so that the center of the cloth is directly above the center of the table. The table is 6 X(times) 2sqrt(3)feet, and the cloth has a radius of 2 feet. What is the area of the portion of the tablecloth covered by the cloth?
February 14, 2011

Chemistry
A buffer solution of pH=9.24 can be prepared by dissolving ammonia and ammonium chloride in water. How many moles of ammonium chloride must be added to 1.0 L of .50 M ammonia to prepare the buffer?
February 13, 2011

Chemistry
What is the [S^-2] in a saturated solution (.1 M) of H2S, in which the pH had been adjusted to 5.00 by the addition of NaOH? For H2S, Ka1= 1.1X10^-7 and Ka2=1.0X10^-14
February 13, 2011

Chemistry
if u add if you add 2.0 ml of 10.0 M HCl to 500 ml of a .10 M NH3, what is the pH of the resulting solution? for NH3, kb=1.8X10^-5
February 13, 2011

ap chem
.004
February 13, 2011

Chemisrty
what is the molality of a 0.075m of ethyl alcohol in water at 25 degrees celcius. Assume the density of the solution at such low concentration is equal to that of water at 25 degrees celcius, 0.997g/ml
February 13, 2011

Math
f(x)=-x
February 13, 2011

business
Research the VISA website. After reviewing of all the documents you can find on the web and in libraries, write a 3-page response to the following questions
February 13, 2011

calculus, limits, l'hopital
Thanks. I made a really stupid error. You've been very helpful in answering my calc questions. I really appreciate it.
February 13, 2011

calculus, limits, l'hopital
Find the limit as x->0 of (2-2cos(x))/(sin(5x)) Mathematically I got 2/5, but on the graph it appears to be 0.
February 13, 2011

math
is that 9 times q times t times 9 times p times t?
February 13, 2011

math
i dont get scale draings how do you work it out?
February 13, 2011

Minds at work
A person that has a sevre overreation to an intense emotion might be experiencing a a. galvanic skin response b. sympathetic rebound c. suppressed emotion d. parasympathetic rebound if you relearn a song that you heard as a child, your savings score for relearning the song ...
February 11, 2011

Teacher's Aide: Helping Abused Children
I don't mean to be mean on this end but that is a very rude thing to ask anyone. 1st off i'm newly married, 6 months pregnant, and this is not the only thing that i'm going to school for. i actually have a 91% in my class and this is the only test that i've had...
February 11, 2011

Teacher's Aide: Helping Abused Children
i for got to post my answers: 1) B 2) D 3) A 4) A 5) C 6) B 7) D 8) A 9) C 10)C
February 11, 2011

Teacher's Aide: Helping Abused Children
1. The Stubborn Child Law enacted by Massachusetts in 1646 permitted parents to A. use corporal punishment when children disobeyed them. B. keep children out of school if they were needed for family work purposes. C. institutionalize a child born with a physical or mental ...
February 11, 2011

algebra
Let x = the salary of the husband. So Lien earned x+1700. Lien's salary + her husband's = 42100 x + 1700 + x = 42100 2x + 1700 = 42100 2x = 40400 x = 20200 Lien's husband earned $20200, and Lien earned 1700 + 20200 = $23900.
February 10, 2011

Math
What are the directions? It's not clear what to do.
February 10, 2011

calculus
Set the denominator equal to zero and solve for x. 3x-14 = 0 3x=14 x=14/3 This is the x-coordinate of the vertical asymptote.
February 10, 2011

math 5th grade
First I would choose a number divisible by 9 to use as an example. I chose 81. If 8/9 of the customers ordered coffee, that's 8/9*81 = 72 customers. If reg coffee was ordered three times as much as flavored, then you want to set it up like this: 3x + x = 72 4x = 72 x = 18 ...
February 10, 2011

Math
It depends a little on what math class you're in how they want you to solve this. But basically, this function is a parabola and you need to find the vertex. x=-b/(2a), where a=-0.5, and b=12 x=-12/(2*-0.5)=12, this is the x coordinate of the vertex and also the number of ...
February 10, 2011

math
First subtract 45-27 = 18 Then subtract 5-8 = -3. Next multiply 3 by -3 = -9 then divide 18 by -9 = -2 finally, the absolute value of -2 = 2.
February 9, 2011

Repost- Calculus; someone please help
Yes it is the right equation. Good job!
February 9, 2011

calculus, limits, l'hopital
Here's what's weird: I graphed the equation and from the left the function approaches 1 as x approaches zero, and from the right it approaches e^3. Doesn't that mean the limit does not exist? The question, however, is multiple choice, with choices of infinity, 0, 3...
February 9, 2011

calculus, limits, l'hopital
Thank you so much! I didn't think to remove the 6x. So helpful, thank you!!
February 9, 2011

calculus, limits, l'hopital
Using l'hopital's rule, find the limit as x approaches zero of (e^(6/x)-6x)^(X/2) I know l'hopital's rule, but this is seeming to be nightmare. I just don't seem to get anywhere. I mistyped the first time I posted this question.
February 9, 2011

advanced funtions
Similarities: Domain and Range the same. Same end behavior, you could say "as x approaches infinity or negative infinity". Differences: They don't have the same reflection characteristics because an x^4 function can have non-symmetrical bumps in it. They're ...
February 9, 2011

calculus, limits, l'hopital
Using l'hopital's rule, find the limit as x approaches infinity of (e^(6/x)-6x)^(X/2) I know l'hopital's rule, but this is seeming to be nightmare. I just don't seem to get anywhere.
February 9, 2011

math
6.4-y = 6 and 2/5 convert 6 and 2/5 to decimal... 2/5=.4 6.4 - y = 6.4 subtract 6.4 from both sides -y = 0 divide both sides by -1 y = 0
February 9, 2011

Math
1.24*10^-3 = .00124
February 9, 2011

algebra word problems
294/14=21 L=6*21=126
February 9, 2011

8th grade math
935*1.4 mil = P*4.5 mil (mult 935 by 1.4) 1309 mil = P*4.5 mil (divide both sides by 4.5) 290.8888888888888=P So P = $290.89
February 9, 2011

I need an answer--molecular/electron geometry
THanks so much
February 8, 2011

I need an answer--molecular/electron geometry
Can anyone help me out with the differences between electron geometry and molecular geometry for SCl6? I think the molecular geometry is octahedral, but I'm not so sure for the electron geometry. Thanks :) *My earlier post wasn't answered, so I'd appreciate some ...
February 8, 2011

math
put it into simple form?
February 8, 2011

Equivalent. Fraction
What is 6/12 in a equivalent fraction
February 8, 2011

Algebra
56/21?
February 8, 2011

Molecular and Electron geometry
Can anyone help me out with the differences between electron geometry and molecular geometry for SCl6? I think the molecular geometry is octahedral, but I'm not so sure for the electron geometry. Thanks :) *My earlier post wasn't answered, so I'd appreciate some ...
February 8, 2011

math
if a figure has 48 square units as it's area and 38 units as it's perimeter what would the figure look like?
February 8, 2011

english
diction?
February 7, 2011

Molecular and Electron geometry
Can anyone help me out with the differences between electron geometry and molecular geometry for SCl6? I think the molecular geometry is octahedral, but I'm not so sure for the electron geometry. Thanks :)
February 7, 2011

REPORT CARD QUESTION
Congrats
February 7, 2011

science
The formula for frequency is: frequency = 1 / T, where T = Period. That is e.g. "cycles per second". The formula for time is: T (Period) = 1 / frequency. Note: T = Period and t = Time
February 6, 2011

SCl6 is used in....?
Thank you very much
February 6, 2011

SCl6 is used in....?
But elements compose compounds. So a compound, say SCl6, cannot create silicon dioxide. . . . I'm now thoroughly confused.
February 6, 2011

SCl6 is used in....?
But isn't SCl6 a compound within itself?
February 6, 2011

SCl6 is used in....?
Does anyone know what SCl6 is used in? Note: I don't mean SF6. *Sulfur Hexachloride* Thank you :)
February 6, 2011

SCl6, Sulfur Hexachloride
Very helpful, thank you!
February 4, 2011

SCl6, Sulfur Hexachloride
I have a project on Sulfur Hexachloride, or SCl6, but I can't find any info on it! Any help?
February 4, 2011

Chemistry
I have a project on Sulfur Hexachloride, or SCl6, but I can't find any info on it! Any help?
February 4, 2011

Chemistry
your dumb
February 1, 2011

Chemistry
When ice melts, it absorbs 0.33 per gram.How much ice is required to cool a 12.0 drink from 72 to 37, if the heat capacity of the drink is 4.18 ? (Assume that the heat transfer is 100 efficient.)
February 1, 2011

physics
A tennis ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s. What is the magnitude of the acceleration due to gravity on ...
February 1, 2011

physics
Explain why the occupants in a running car observe objects on the roadside as though they are running backwards.
January 27, 2011

public relation
what has the result of what the artist Chris Brown led for the public to say or view him?
January 26, 2011

technology
does that mean the hard drive size or this Double-layer DVD±RW/CD-RW or something
January 26, 2011

technology
what does Hard Disk-FDD/HDD mean?
January 26, 2011

Geometry
In Triangle SUM, if SU = 10 cm and UM = 15 cm then MS must be less than how many centimeters? 10 15 20 25...... Am I right?
January 25, 2011

english
like you might avoid paying your bill in order to purchase something you want
January 23, 2011

english
What effect does lacking personal responsibility have on materialism?
January 23, 2011

geometry
Find the perimeter of an isosceles trapezoid with base lengths of 10 and 18 and height of 8.
January 20, 2011

geometry
Find the perimeter of an isosceles trapezoid with base lengths of 10 and 18 and height of 8.
January 20, 2011

chemistry
A catalytic converter combines 2.55 g CO with excess O2.What mass of CO2 forms?
January 20, 2011

algebra
11T over 28 - T over 4=1
January 19, 2011

math
4x27= partial products: product:
January 10, 2011

physics/chemistry
(a) An ideal gas occupies a volume of 1.0 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. i got that right to be 2.5e19 molecules (b) If the pressure of the 1.0 cm3 volume is reduced to 1.0 10-11 Pa (an extremely good vacuum...
January 3, 2011

physics/chemistry
oh, ok. that makes sense. Thanks!
January 3, 2011

physics/chemistry
i am getting .15 and .24 and i keep getting it wrong. i dont know what im doing wrong.
January 3, 2011

physics/chemistry
A rigid tank contains 0.40 moles of oxygen (O2). Determine the mass (in kg) of oxygen that must be withdrawn from the tank to lower the pressure of the gas from 37 atm to 23 atm. Assume that the volume of the tank and the temperature of the oxygen are constant during this ...
January 3, 2011

physics
An object weighing 325 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 250 N. Immersed in oil, the object weighs 275 N. (a) Find the density of the object. (b) Find the density of the oil.
December 19, 2010

calculus
Find all the critical numbers for the function f(x) = cube root of 9-x^2. help please?!
December 17, 2010

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