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Proof math problem help? Please help if you can!

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Math
Please help me with this problem: A bourbon that is 51 proof is 25.5% alcohol by volume while one that is 82 proof is 41% alcohol. How many liters of 51 proof bourbon must be mixed with 1.0 L of 82 proof bourbon to produce a 66 proof bourbon? Give answer to 3 decimal places. ...

college math
I posted this problem earlier, but I still can't figure it out. It is for extra credit. I was hoping if someone could please solve it. I would greatly appreciate it. A bourbon that is 51 proof is 25.5% alcohol by vol. while one that is 82 proof is 41% alcohol by vol. How many ...

Philosophy
I need help with this proof for my philosophy class. This proof is supposed to be done via indirect proof or conditional proof, so it is supposed to use AIP and IP or ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be...

Philosophy
I need help with this proof for my philosophy class. This proof is supposed to be done via indirect proof or conditional proof, so it is supposed to use AIP and IP or ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be...

Philosophy
I need help with this proof for my philosophy class. This proof is supposed to be done via indirect proof or conditional proof, so it is supposed to use AIP and IP or ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be...

math
A bourbon that is 51-proof is 25.5% alcohol by volume while one that is 82-proof is 41% alcohol by volume. How many liters of 51 proof bourbon must be mixed with 1.0-L of 82 proof bourbon to produce a 66 proof bourbon? Give answer to three decimal places.

Math
What is wrong with the following proof. You must explain your answer in words. a>3 3a>3(3) 3a-a^2>9-a^2 a(3-a)>(3-a)(3+a) a>3+a 0>3 the problem with the proof is that the fourth step needs the sign to be reverse...but why? i looked at step 3 and there is ...

Proof math problem help? Please help if you can!
Let AB be the diameter of a circle, and let point P be a point on AB. Let CD be a chord parallel to AB. Prove that PA^2 + PB^2 = PC^2 + PD^2 It can be solved using geometry methods (no trig). Anyway, I figured out that PA^2 +PB^2 = 2OP^2 + 2OB^2. However, I cannot find right ...

Abstract Algebra
If 2^n>n^2 and n>5, then 2^n+1>(n+1)^2 Proof: Assuming that 2^n>n^2 then I can say that 2*2^2>2*n^2 = 2^n+1>2n^2 If I can show that 2n^2>(n+1)^2 then I will be done by transitivity. So 2n^2>(n+1)^2? then 2n^2>n^2+2n+1? then n^2>2n+1, hence n^2-2n-...

communication
In general, thesis or central idea is supported by claims; claims are supported by proof; and A.proof is supported by development,including details and examples B.proof is supported by the specific purpose C.proof is supported by solutions A?

Coordinate geometry
Our lesson coordinate geom already now analytic proof . HOW TO DO ANALYTIC PROOF ? PLEASE PLEASE HELP THANKS VERY MUCH

Math quiz
Proof that half of 9 is 4.. uhm..it's proove instead of proof need a clue?

Geometric progression
sum of 4 terms of g p is 30 & sum of first and last term is 18 . Find gp a(r^4-1)/(r-1) = 30 a + ar^3 = 18 a(1+r^3) = 18 it's easy to see that if a=2, r=2 Does that work on S4? 2*15/1 = 30. Yes So, the GP is 2,4,8,16,... But sir I want not logic proof , please give complete proof

math (geometry)
how do you do this problem? If ZY=7XY then ZX=8XY It is a two colun proof

Geometry
Write a two-column proof. Given: 7y=8x-14; y=6 Prove: x=7 I need help making a two-column proof with the statements and the reasons, please! Thank you! ( This is what I have so far) Statements | Reasons 1. 7y=8x-14;y=6 | Given 2. 7(6)=8x-14 | Substitution 3. ????|???? 4...

science
when they talk about proof in regards to alcohol. how is proof determined. how do you proof alcohol.

Geometry
Discuss the differences between a coordinate geometry proof and a proof method that does not require coordinate geometry. When would it be appropriate to use a coordinate proof rather than another proof method?

Coordinate Geometry: Ms.Sue or someone please help
Hi! Can you please help me with this problem/proof? I'm not sure how to approach it. Thanks! Prove that a line perpendicular to a radius at the point where the radius meets the circle is tangent to the circle. Use coordinate geometry.Hi! Can you please help me with this ...

Coordinate Geometry: Ms.Sue or someone please help
Hi! Can you please help me with this problem/proof? I'm not sure how to approach it. Thanks! Prove that a line perpendicular to a radius at the point where the radius meets the circle is tangent to the circle. Use coordinate geometry.Hi! Can you please help me with this ...

Proof reading
Hello, my research paper is due Friday, and I am done with it. I need someone to proof read it and I was wondering anyone is willing to proof read 6-7 pages of text. I know that's alot to ask for, but I need a good grade on this. Is there anyone available tomorrow that think ...

DISCRETE MATHS
Prove that for every set S, Ø \subseteq( S. i need to Use vacuous proof. i know that vacuous proof is when the hypothesis is always False. but for this i find it very difficult please can you help me prove this? thanks.

Maths- very very simple
can someone tell me what the title of this proof is? a^2+b^2=c^2 im writing a paper on the Pythagorean theorem and this is the proof I would use to explain it to someone but idk the name of it. PLEASE help me out here.

Language Proof and Logic(Philosophy)
exercise 5.8 write an informal proof of Premises: LeftOf(a,b) | RightOf(a,b) BackOf(a,b) | ~Leftof(a,b) FrontOf(b,a) | ~RightOf(a,b) SameCol(c,a) & SameRow(c,b) conclusion BackOf(a,b) State if you use proof by cases.

U.S. History
please check this how did the Nationalists regard Shay's Rebellion? a. as proof that the states had too little power b. as an example of how governments abuse their power c. as proof that only a strong national government could prevent social disorder d. as a demonstration of ...

chem
drbob you helped me with this problem the other day but i have a question. -i changed 500mL of ethanol to grams then to mol. i was wondering if i then used 1000mL or 500mL of water to change to kg? The "proof" of an alcoholic beverage is twice the volume percent of ethanol, ...

Math
help please anyone? i'm having a hard time solvig these problems LOGIC CONDITIONAL PROOF. HOMEWORK HELP PLEASE!? A. 1. A -> (B -> C) 2. (C ^ D) -> E 3. -F ->(D ^ -E) / :. A -> (B -> F) B. 1. (A v B) -> -(C ^ D) 2. (-C v -D) -> (E <-> F) 3. (E <...

Philosophy
I need help with this proof for my philosophy class. This proof is supposed to be done via conditional proof, so it is supposed to use ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be precise and the assignment is ...

Coordinate Geometry
Hi! Can you please help me with this problem/proof? I'm not sure how to approach it. Thanks! Prove that a line perpendicular to a radius at the point where the radius meets the circle is tangent to the circle. Use coordinate geometry.Hi! Can you please help me with this ...

english
when and where did Euclid write the proof of the pythagorean theorem. why did the proof was written.

algebra proof
Prove (ab)/b=a Proof 1. (ab)/b=(ab)x 1/b Is this property of reciprocal? or definition of division

Physics
I'm trying to prove Kepler's equations the proof is in my book but I don't understand it (T1/T2)^2 = (s1/s2)^3 ok first what allows us to rewrite that formula as so??? (s1^3/T1^2)=(s2^3/T2^2) my book goes about the proof as m1 ((4 pi^2 r1)/T1^2) which I get but then where does...

Math/Algebra
can someone please help me write a proof for the following: --a(-a)=a

Geometry
Given IE is congruent to GH, EF is congruent to HF. F is the midpoint of GÌ. Prove the triangles EFI is congruent to HFG. . Can you please help me to understand how to do this problem? I don't understand how to find a proof. Thank you so much for your help.

math...help please!
ok i REALLY am stumped. please help! it is a sequence problem here is the problem.... 120,60,30 __, __, __. if you could give me the rule for this problem and the next 3 numbers that would be so great!!!!!!

Pre calc
Please help me proof the identity. This isn't even math to me, I can not understand it so please show all work. God bless A)1-cos2x/sin2x=tanx B) sin4x/sinx=4cosxcos2x

chemistry
the word "proof" on alcoholic beverages is defined as twice the percentage by volume. How many ml of alcohol are in a one-liter bottle of 80-proof gin?

English grammar
Is it problems or problem? The possession of guns among law enforcement officials is at the core of the (problems or problem) of unnecessary force and the unwarranted killing of suspects. I appreciate all of your help. I'm just trying to proof reading a final draft. Thank you.

Maths
Please solve this trigonometric identity proof problem. I have completed 20; this is the hardest one. Many thanks (sin^3(x)-cos^3(x))/sin(x)-cos(x)=1+sin(x)cos(x)

MATH
Using the Law of Cosines for vectors, give a vector proof that if quadrilateral ABCD is a rhombus, diagonal AC bisects <BAD. As part of your proof include a carefully drawn figure a statement of what is given, and a statement of what you are proving. I need help with this. ...

informal Logic
God must exist for there can be no other explanation for the order and complexity of the world. Some say there is no proof, but to me the proof is all around us. The conclusion of this argument is:

Calculus
What is the simplest solution to the Brachistochrone problem and the Tautochrone problem involving calculus? (I know that the cycloid is the solution but I need a simple calculus proof as to why this is the case)

Discrete Math Proof Exercise
Prove that if 3n^2+5 is odd, then n is even. Please post a detailed answer. Thank you.

math help
Thank you for helping me with the last problem Reiny and Bosnian. However, I have one more problem that I need help with please and I have no idea how work the problem. I used an on line calculator to get the answer. It didn't give an explanation on how to do the problem ...

math
can someone give me proof that a negative number times a negative number is a positive number I've always been told this in like seventh grade that it is but havne't been given any proof

Pre-Calculus
Can someone please help me with this problem? De Moivre’s theorem states, “If z = r(cos u + i sin u), then zn = rn(cos nu + i sin nu).” • Verify de Moivre’s theorem for n = 2. a. Provide a correct proof that includes written justification for each step.

Trig Proofs
Please Help: please solve this proof: cosx- cosy = -2sin(x+y/2)sin(x-y/2)

Logic- Formal Proof
I need to solve a proof and I cannot figure it out. The instructions say only that I will have to use subproofs within subproofs. Premises: A or B A or C Conclusion: A or (B and C)

Law
what is the appropriate level of proof for showing a valid Miranda waiver? Proof beyond a reasonable doubt, Probable cause, Preponderance of evidence, Clear and convincing evidence

english
I need someone to proof read my essay? are there any communities where i can get it proof read?

math
What is used to support the steps of a geometric proof? a) evidence based on observation or experiment b) measurement and observation of many cases c) postulates, definitions, given statements, and proven theorems d) steps in a geometric proof do not require support

science
The "proof" of an alcoholic beverage is twice the volume percent of ethyl alcohol, C2H5OH in water. The density of ethyl alcohol is 0.789g/ml and that of water is 1.00g/ml. A bottle of 100 proof rum is left outside on a cold winter day. a.) Will the rum freeze if the ...

science
After drugs were administered, the brain activity of each person was recorded. This statement should be classified as 1 the problem = the main issue or subject being investigated in the study 2 a method= a procedure , process, or approach used to investigate the problem 3 a ...

Math (please check my answer)
Write a proof for the following. I have 2 answers but I don't know what the other 2 would be? Can anyone help?i68.tinypic(.)com/k2nw9.jpg

Proof by contradiction
Use proof by contradiction to show there is no real number x: 4x^2+1/4x <1

chem
The "proof" of an alcoholic beverage is twice the volume percent of ethanol, C2H5OH, in water. The density of ethanol is 0.789g/mL and that of water is 1.99g/mL. A bottle of 100-proof rum is left outside on a cold winter day. a) Will the rum freeze if the temperature drops to...

geometry
1)given-AB=CD,CD=EF prove-AB-EF (in 5 steps that show why it is corect; i.e two-column proof) 2)Given-<2=<3, <4=<5 prove-<1 is supplementay to <6 (in 3 steps, with the two column proof) TWO-COLUMN PROOF LOOKS LIKE THIS.... STATEMENT: REASON: 1.AB=CD,CD=EF 1....

Specialist Mathematics
Need help with three proofs. Proof#1: Prove that |x+y| is less than or equal to |x|+|y| Proof#2: Prove that |x|-|y| is less than or equal to |x-y| Proof#3: Prove that |x+y+z| is less than or equal to |x|+|y|+|z|.

Math! Please help!
This is an inequality problem/question. I dont know if I'm right in solving this problem: 15 ≤-k/4-9 (k/4 is a fraction) Please help! I got 5.25 ≤k

math
my topic is all about sums and differences of a rational algebraic expression this is the problem 3a/ax+ay + 2a/ax+ay another problem is a/4a+1 + 2/4a^2-7a-2 another is 3/a-b + 4/a+2b please anyone else who can answer my assignment please HELP ME!

math- Triangle facts
Explaining the isosceles theorem. Explain why the SAS Inequality theorem is also called the Hinge theorem. the steps for Indirect Proofs and using an indirect proof with an algebraic problem.

Math
can you please check this problem for me, and if I happen to get it wrong. explain it? thank you =]]. -6x=54 this is the problem. -6x =54 +6 +6 x = 48 ?? is this right please respond. =]]

English
Some ideas to write an argument about why the book 'follow the rabbit proof fence' is better than the movie 'rabbit proof fence'.

chem
calculate the number of grams of alcohol present in 1.70 L OF 75-Proof gin. The density of ethanol is 0.798 g/ml. Proof--> twice the % by volume of ethanol(C2H5OH) present.

science someone please check my answers
i just want to know if my answeres are correct! A.The problem = the main issue or subject being in vestigated in the study B.a method=a procedure, process, or approach used to investigate the problem C.a finding=a proven result obtained as a part of the investigation D.an ...

Geometry
Write a two-column proof. If point g is the centriod of triangle ABC and BG = 18. Find GE and BE. My work: ge is half so its 9. be equals 18 + 9 = 27 i need help on two column proof part

Geometry
I don't know how to do this proof It is set up on a T chart In the figure below PQ = RS Prove PR=QS ______P________Q_____R________S______ Proof must be set up on a t chart starting with PQ=RS Given

Math logarithms
The graph, y=lg x is rotated 90 degrees anticlockwise around the origin. What is the equation of the new graph? Please provide proof.

informal Logic
God must exist for there can be no other explanation for the order and complexity of the world. Some say there is no proof, but to me the proof is all around us. The conclusion of this argument is: (Points : 1) God exists There is no other explanation of the order and ...

mat advance analysis
True or False: If a|b and a|(b + 1), then a = ±1. [NOTE: Use this Theorem 3: If a|b and a|c, then a|(bx+cy) for any integers x and y. PROOF: Since a|b, there is an integer u such that b = au. Since a|c, there is an integer v such that c = av. Substituting, bx + cy = aux + avy...

English
Would someone be willing to proof read my English essay? I proof read it but I don't know if I got all the mistakes.

math
i need help on a proof, can anyone help? please HELP!!!! me on the difference between 3/4 and 1/3???????? You have to find the common denominator of 3 and 4, which can be 12. The first fraction becomes 9/12 and the second becomes 4/12. 9/12 - 4/12 = 5/12.

Geometry
Please help me! I have a proof that is very difficult

Calculus I
Show that the equation x^4 + 4x + c = 0 has at most two real roots. I believe we're supposed to prove this by proof of contradiction using Rolle's Theorem, but I'm not quite sure how to do this problem.

math
Can someone please help me with this math problem. My teacher is looking for me to show my work, but I don't how to solve the problem to show my work. Please help!!! The problem is 2 1/2 + 3 1/4 + 3 5/8. Thank you for your help.

math
Saying that 4<(sq.root of x)<9 is equivalent to saying what about x ? a. 0<x<5 b. 0<x<65 c. 2<x<3 d. 4<x<9 e. 16<x<81 Please help. Does this problem relate to 'x'values on the xy coordinate system ? If so please explain the concept here. If ...

chem
An 80 proof brandy is 40.0% (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage.How many milliliters of alcohol are present in 700mL of brandy?

Algebra II
The problem is:Prove that the statement 1/5+1/5^2+1/5^3+...1/5^n=1/4(1-1/5^n) is true for all positive integers n. Write your proof in the space below. How do I start this? I have looked at the only example in the book but it did not help me. Any help in this would be great!!

Algebra II
The problem is:Prove that the statement 1/5+1/5^2+1/5^3+...1/5^n=1/4(1-1/5^n) is true for all positive integers n. Write your proof in the space below. How do I start this? I have looked at the only example in the book but it did not help me. Any help in this would be great!!

science
left-handed people demonstrated greater brain activity than right-handed people when under the influence of drugs. This statement should be classified as 1 the problem =the main issue or subject being investigated in the study 2 a method = a procedure, process, or approach ...

U.S. History
i need help with this quesiton How did the Nationalists regard Shay's Rebellion? a. as proof that the states had too little power b. as an example of how governments abuse their power c. as proof that only a strong national government could prevent social disorder d. as a ...

Philosophy
exercise 5.8 write an informal proof of Premises: LeftOf(a,b) | RightOf(a,b) BackOf(a,b) | ~Leftof(a,b) FrontOf(b,a) | ~RightOf(a,b) SameCol(c,a) & SameRow(c,b) conclusion BackOf(a,b) State if you use proof by cases.

science,technology and the environment
describe,compare and contrast induction and deduction as methods of science.using examples where appropriate.Identify and solve a problem using both induction and deduction.where appropriate illustrate why and how one would use experimentation and cycle of proof to solve the ...

Math
Could someone please help me with this math problem. I am lost on trying to solve this math problem. Add. Simplify if possible. s+r/sr^2 + 2s+r/s^2r Thanks.

science
right-handers exhibited an equal or more active brain response in slightly more than one-fourth of the drug trials, compared to left-handers. This statement should be classified as 1 the problem= the main issue or subject being investigated in the study 2 a method= a procedure...

Calculus
Hi there i am having some problems trying to do my calculus homework and i really need help on how to show the step to proof the volume of a sphere which is V= 4/3pirsquare. But I have to use triple integral to proof the volume of a sphere. Please help me and give me some good...

geometry
ughh i need help i dnt like proofs we'll here it the instructions write a two column proof the segment addition postulate is useful for this proof also. remember that the transitive && substitution properties are common in proofs this one requires substitution.. given is rs=xy...

Science - Chemistry
A certain elixir is 92 proof. A proof is twice the volume percentage of alcohol in a blend. Ethanol's structural formula is CH3CH2OH with a molar mass of 46 grams/mole. The density is .79 g/ml. How many liters of elixir must one have in order to have 50 moles of carbon?

Science ...Urgent plz
Describe, compare and contrast INDUCTION and DEDUCTION as methods of science – using examples where appropriate. Identity and solve a problem using both induction and deduction. Where appropriate illustrated why and how one would use experimentation/ “cycle of proof” to ...

mat115
Please help with this math problem. The directions are Add. Must show work. 4 2/7 + 1 5/7 I appreciate your help with this math problem. Thanks so much.

4 grade math
i need help on this problem. make 36/9 into a false number sentence? please! help me to understand this math problem thank you for your kindness.

Math
Dear Reader, Can you help me with my math problem on my homework please? There is nobody at my house who can help me yet. So when you get the chance can you help me with my problem? Thanks for reading. From, Portia1214

Complex Number Proof
Prove: If Z and W are complex numbers, then the conjugate of (Z+W) is equal to the conjugate of Z plus the conjugate of W. My thought is that this is kind of like the distributive property, but I'm not sure. It doesn't help that I haven't written a proof in over 10 years. Help...

Geometry
I'm given a rhombus (BCDE) and I am supposed to make a proof. There is a diagonal across the rhombus from C to E. I am given that CE bisects angle BCD and BED. I am supposed to prove that BE is congruent to DE. If you could help me at least start writing the proof in list form...

math
Please help solving this problem. Solve the following word problem: One poll reported that 48% of city residents were against building a new stadium. The polling service stated that the poll was accurate to within 3%. What is the minimum percent of city resident that oppose ...

Geometry
Writing indirect proofs. Can someone please check for me. I am not sure If this is correct.Thanks much Given: triangle ABC angle B=120 degree Proof: Triangle A does not equal 60 degree Plan: Using an indirect proof, using the paragraph method My answer. Assume temporarily that...

Elementary Euclidean Geometry(Math)
Little Joseph once said: I was once asked to prove that (PROOF ONE) in a right triangle, the sum of the squares of two sides equals the square of the third. Smart little rascal that I am, I proved it with ease. I was then asked to prove that (PROOF 2) if the sum of the squares...

Please help trig proof
((cotx+cscx)/(sinx+tanx))=cotxcscx Please prove left side equal to right side, only doing doing work on the left.

Math Calculus
This is all about the intermediate value theorme.. You wish to visit you sweetheart, but you don't want to go all the way over to their house if your sweetheart isn't home. What sort of "existence proof" could you do beforehand to decide whether it is worthwhile to make the ...

Analytical Proof
The Theorum of Apollonius states in triangle ABC, if M is the midpoint of BC, then AB^2 + AC^2 = 2AM^2 + 2MC^2. Prove this theorum using analytic methods. http://www.google.com/search?hl=en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=Theorem+of+Apollonius+proof&spell=1

Math problem
having problems working this problem out please solve 49 5/2

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