Thursday
November 27, 2014

Posts by Marco


Total # Posts: 228

probabilities
Question: Five cards are dealt from standard deck of 52 cards, what is the probability of being dealt 3 kings? Here is what I have P(3 kings)= C(4,3) = 3 out of 4 kings being dealt C(48,2 = 2 out of remaning cards to complete 5 card deal C(52,5) = 5 cards dealt out of 52 card ...
March 4, 2011

algebra
you have to isolate the variable, so based on that which one is easier to isolate? Y right? So the answer would be y=x+3
March 4, 2011

proabilities
LOL..not very realistic example by the textbook. Would you mind helping understand how you came up with that? which one of the probability formulas was used..I understand the answer just not sure how you came about it. Thanks
March 3, 2011

proabilities
Suppose the NBA has decided to add two more teams to the league. If 18 cities have applied for franchises, what is the probability that in a random drawing, the league selects the two westernmost cities? Having trouble with this one.
March 3, 2011

Math
Thank you!
March 1, 2011

Math
Confused on permutation or combination on this question: A VISA credit card has a first digit of 4 followed by 15 other digits. How many different VISA accounts does this allow? I know the formulas but I am having a hard time determining which one to use. Help!!!
March 1, 2011

Trigonometric Ratios
Right traingle ABC is graphed pm the coordinate plane and has vertices at A(-1,3), B(0,5), and C(4,3). What is the measure of angle C to the nearest degree? F:27 G:29 H:32 J:43
February 14, 2011

Geometry
The hypotenuse if a right triangle measures 9 inches and one of the acute angles measures 36 degress. What is the area if the triangle? Round to the nearest square inch.
February 14, 2011

Geometry
A right triangle has an angle that measures 55 degress. The leg adjacent to this angle has a length of 43 cm. What is the length of the triangle? Round to the nearest tenth
February 14, 2011

Math
thank you!
February 11, 2011

Math
-6≤x/2-4<-3
February 11, 2011

Math
just as it is written: -6 is <or= x/2-4 < -3
February 11, 2011

Math
le is less than or equal and lt is less than..was not sure how to less than equal on the computer
February 11, 2011

Math
I'm stuck on solving this one. If I could get some help please. -6 le x/2 - 4 lt -3
February 11, 2011

math
Stuck on solving this inequality, help please. 3X le 15 and 2x gt -6
February 10, 2011

3 states of matter
hi can you please help me by giving some facts on the 3 states of matter solid liquid gas
January 28, 2011

physics problem
how did u calculate "time to fall". and what is H and g in the equation: sqrt(2 H/g) = 2.86 s?
December 20, 2010

physics problem
A cannon is fired horizontally from atop a 40.0 m tower. The cannonball travels 175 m horizontally before it strikes the ground. With what velocity did the ball leave the muzzle?
December 20, 2010

PHYSICS
is g 9.8 or -9.8?
December 20, 2010

PHYSICS
A cannon is fired horizontally from atop a 40.0 m tower. The cannonball travels 175 m horizontally before it strikes the ground. With what velocity did the ball leave the muzzle?
December 20, 2010

physics
i dont understand your work. please try to explain it more thoroughly.
December 20, 2010

science
hey, check out wiki by yourself. I found a lot of examples
December 5, 2010

math
B--------------C--------A |------6-------|----4----| A = 8
December 5, 2010

math
B--------L--------A |---3----|----3----| 7-4= 3 4-3 = 1 so, B = 1
December 5, 2010

math
B can be -7 or 3
December 5, 2010

math
???What is the question?
December 5, 2010

math
do you mean (√2y)(√3)(√8y) =[(2y)^0.5][(3)^0.5][(8y)^0.5] ??????? If so,it is (√48)y=(4√3)y
December 5, 2010

algebra
....this question have trivial solution m=-3/4 n=-67/8
December 5, 2010

algebra
hey , they are same on both sides. CAN'T solve!
December 5, 2010

Probability
total no. of the combination of two dice = 21 3/21=1/7
December 5, 2010

College physics-oscillations
hey, anyone help???? This is the most difficult question in my assignment and i need to hand in on monday!!!!!!!!!
December 4, 2010

College physics-oscillations
A ball is attached by two spring as shown [vvvOvvv]. If the mass is displaced a distance â–³x BELOW the equilibrium position h (see figure A). Determine whether vertical SHM is possible for the system shown.If so, find the natural frequency. [Assume that the ...
December 4, 2010

Physics
oh, i know why i am wrong.it is because i take friction a wrong direction. thanks very much!(Damon is correct!)
December 4, 2010

Physics
(force exerted by father)+(friction)-weight along the slope = 0 F+(0.2)(35x9.81xcos11)-(35x9.81xsin11)= 0 F= -1.89N (hey, why it is negative? It is wrong. I need more information) work done = F.S
December 4, 2010

Physics
lol, both method can find the answer
December 4, 2010

Physics
At equilibrium position, K.E.=max,P.E. = 0 At the two extreme points, K.E.=0,P.E.=max Total energy is constant at ANY POINT. We find E at extreme point. E = 1/2*k*(0.8)^2 = 0.24J
December 4, 2010

physics
lol, you are welcome
December 4, 2010

physics
K.E. = P.E. 1/2mv^2 = mgh v^2 = 2gh v = (2gh)^(1/2) v = (2x9.81x155)^(1/2) v = 55.146m/s
December 4, 2010

AP Physics
I am a Hong Kong student. But i think i may help you. The only force on the ladder from the wall is the horizontal force.The system here is in static equilibrium. Net torque is zero.Let the total length of the ladder be 1m. then, (1)[(29+9.9+7.1)(g)(0.68)]sin⊙...
December 4, 2010

College physics-oscillations
A ball is attached by two spring as shown [vvvOvvv]. If the mass is displaced a distance â–³x BELOW the equilibrium position h (see figure A). Determine whether vertical SHM is possible for the system shown.If so, find the natural frequency. [Assume that the ...
December 4, 2010

Physics
I am a student.But i think i may help you.....the formula for the period of a simple pendulum is T = 2pi(L/g)^0.5.........as you can see..the mass do not affect the period.
December 4, 2010

physical science
what does Q=m times t times c. mean and wat are the meaning of each letter
November 30, 2010

math
thanks!
November 15, 2010

math
having a little trouble following the steps to complete this problem. Rewrite each expression with a positive ration exponent. Simplify if possible: 16^-3/4
November 15, 2010

physical
This is related to physics since it is talking about relativity. The answer is c. Imagine looking out your car window at a bus stop. If you are moving right, the bus stop seems to be moving towards your left. It moves to the left at the same speed as you move to the right. ...
October 30, 2010

english-poetry
thank you
October 16, 2010

english-poetry
I need some help in finding some good one stanza (4 lines) poems. Tried googling but my googling skills are not very good. Maybe one of you have a good list? Thanks
October 16, 2010

physiology
Need help with this one, can't really locate the answer. Consider the bifurcation of a vessel at 20 degrees from the line of blood flow (region a) and a vessel that gives off two vessels at 90 degrees from the main stream of the vessel (region b). Which region is more ...
October 11, 2010

biology
What happens to the cells of the body when large quantities of sodium ion were introduced to the blood stream?
September 24, 2010

Science
What happens to the cells of the body when large quantities of sodium ion were introduced to the blood stream? Having trouble with this question, any help please! ;-)
September 23, 2010

math
thanks
September 2, 2010

math
a) 6(2x-3)-5(3x-2) i have -3x-8 b) 8-2[3-5(3x-1)] not sure Thanks
September 2, 2010

math
Not sure of this one. Factor completley 1-81z^2 and this on 16p^2q^2-8pq^2+q^2
May 19, 2010

Math-Factoring
Factor completely. 10x^2yz^2 + 15xy^3z I came up with 5xyz(2xz+3y^2) Correct?
May 19, 2010

Chemistry
Which of the following substances has the greatest solubility in water? A. Ca(OH)2, Ksp = 6.5 × 10-6 B. Ag2SO4, Ksp = 1.5 × 10-5 C. PbI2, Ksp = 7.9 × 10-9 D. Zn(IO3)2, Ksp = 3.9 × 10-6 E. BaF2, Ksp = 1.5 × 10-6
May 2, 2010

Math-Factoring 2
AAAAAAAAAAAAAAAHHHHHHH...thanks..it's in the details.
April 16, 2010

Math-Factoring 2
The last one shold be (x ) (x )
April 16, 2010

Math-Factoring 2
Factor Completely 2x^3-40x^2-192x I have a common factor of x so I rewrote the problem as x(x^2-40x+192) then trying to use FOIL rewrote as (x ) (x ) And that is where i'm stuck.
April 16, 2010

Math - Factoring
Thank you. I am not feeling 100 percent confident in this topic, so you might see a few more, i do appreciate the help!
April 16, 2010

Math - Factoring
Factor Completely 6^8+12x^6-24x^4+30x^2 I got 6x^2(x^6+2x^4-4^2+5) Correct?
April 16, 2010

math
Thanks!
April 15, 2010

math
I am not totally understanding this process. Factor Completely: x^5y^2 - x^4y^2 - 2x^3y^2
April 15, 2010

Algrera
Write the equation of the line passing through the given two points? a) (3,7) and (4,7) Answer: m=7-7/4-3 b) (2,7) and (2,9) Answer: m=9-7/2-2 c) (5,-3) and (1,7) Answer: m=7-(-3)/1-5 Correct?
March 7, 2010

Algrebra
I see it thanks...
March 7, 2010

Algrebra
Write the equation of the line passing through the given point with the given slope. a) point (3,-2) with slope of m=5/3 Answer: y-(-2)=5/3x-3 b) point (3,9) with slope m=(-2/7) Answer: y-9=-2/7x-3 Correct?
March 7, 2010

Algebra
Great! Thanks
March 6, 2010

Algebra
1. Write the equation of the line with the given slope and y-intercept a) m=3/8 and b=6 Answer: y=3/8x +6 b) m=-2 and b=11 Answer: y=-2x+11 c) m=0 and b=6 Answer: y=x+6 Correct?
March 6, 2010

Algebra
thanks!
March 6, 2010

Algebra
Thank you bun, but how did you come up with that anser for B
March 6, 2010

Algebra
3. Find the slope of each line with equation as given. a) Y=4 b) X=2 Answers: a) zero b) undefined 4. Graph the following equations: a) 3x-2y=6 answer: (2,0) and (0,-3) b) 5x+3y=6 (need help with this one) Are they correct and would need help with b.
March 6, 2010

Algebra
Thanks you will, just looking for validation and help on the ones i don't unsderstand. Thanks again.
March 6, 2010

Algebra
1. Compute the slope of the line containing each pair of points. a) (3,7) and (4,7) b) (2,7) and (2,9) c) (5,-3) and (1,7) Here is what I got. a) 0 b) undefined c) -10/4 reduced to -5/2 Correct?
March 6, 2010

math
Thanks. I was translating the problem incorrectly. I got the right answer using the formula A=P*B A=15*102 A=15.30 15.30 + 102.00 = 117.30 Thanks.
February 11, 2010

math
Never mind it's not right..just having a brain fart :-)
February 11, 2010

math
errrgg..i meant i figured out #2 i need help with #1. My formula is as instructed. B=a/p (Base=amount/percent) My answer is: B=102.00/0.15 B=6.80 so the regular prices is 102.00+6.80=108.80 Is that correcT?
February 11, 2010

math
I figured out #1 just need help with #1
February 11, 2010

math
I have two questions. I am trying to use the formulas our teacher used but I am still confused. I will discuss it with him tonight but I just wanted to get a different perspective. #1 Amy paid $102 for a pair New Balance 1122 running shoes during a 15%-off sale. What was the ...
February 11, 2010

math-percent
Thanks.
February 10, 2010

math-percent
Is anyone familiar with this formula for figuring out percent? How it would work? p/100 = of/is
February 10, 2010

Algebra
Help with this one: 2/3+4t=6t-2/15
February 6, 2010

Algebra help
thanks this helps quite a bit.
February 3, 2010

Algebra help
m having an extremely tough time with integers in algebra when simplifying algebraic expressions. No matter which method I use I still end up confused and end up with a completely different answer. Ex: 5t-{7t-[4r-3(t-7)]+6r}-4r
February 3, 2010

algebra
I am having an extremely tough time with integers in algebra when simplifying algebraic expressions. No matter which method I use I still end up confused and end up with a completely different answer. Ex: 5t-{7t-[4r-3(t-7)]+6r}-4r
February 3, 2010

Chemistry
C! zero degrees
January 3, 2010

English
Bump..any comments?
December 9, 2009

Egnlish
Writing an argument essay. If anyone can read and comment that would be great!. Helicopter Parents: Harmful To Our Youth Picture the following: A young woman twenty-two years of age walks into her apartment, she turns on the light switch and the light in the main lamp does not...
December 9, 2009

Physical Science
How many calories of heat are required to raise the temperature of 550g of water from 12.0 degrees celcius to 18.0 degrees celcuis
November 13, 2009

English
Yes that is where it's at, I will take your suggestion and move it down. Thank you Writeteacher.
November 6, 2009

English
Sorry, one more thing, can you identify the thesis fairly easy?
November 6, 2009

English
LOL.. Thanks. I did separate it in the paper but it did not separate when I cut and paste.
November 6, 2009

English
I have been asked to write a synthesis essay. I have never written this type of essay before. This is my first rough draft, I am just looking to see if I have the right approach etc. Thanks! Passion vs. Logic: Immigration Reform One of the most polarizing issues in our country...
November 6, 2009

English Essay
Thanks GuruBlue for the feedback. I will look for those clauses. Although it's not my forte.
September 17, 2009

English Essay
Doing a summary response essay, looking for comments, suggestions, corrections thanks!!!!!! I see them. We all see them. They are powerful, hypnotic and persuasive. Images. We cannot pry our eyes from them. We can shut the books and magazines if we do not like the writings. We...
September 17, 2009

English
Thank bobpursley and writeteacher. Great feedback.
September 3, 2009

English
Need some feedback if this works as a summary. Thank you. In “Power of Images: Creating the Myths of Our Time,” J. Francis Davis believes communication by images with its voluminous exposure and alluring advertisements, has overpowered what can be considered ...
September 3, 2009

College English
Thank you. I appreciate the feedback.
September 2, 2009

College English
I have been asked to present a gist statement and I am just looking to find out if I understood the concept. Below is what I've been asked to analyze: We see them everywhere: on billboards, in magazines, on bus placards. They come in the mail and in our Sunday newspapers: ...
September 2, 2009

College English
Thank you!
September 2, 2009

College English
Does anyone have any good, simply explained sources on how to use the MLA format?
September 2, 2009

9th grade biology
"saturated"
August 26, 2009

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