Saturday

July 2, 2016
Total # Posts: 1,167

**Math**

How to Generate Pythagorean Triples using an Odd Number 1. Start with an odd number, e.g. 3. Then the square of 3 can be expressed as the sum of two consecutive numbers, i.e. 32 = 9 = 4 + 5. Therefore the Pythagorean Triples are {3, 4, 5} since 32 + 42 = 52. Generate another ...
*February 22, 2012*

**Math**

1. Start with an odd number, e.g. 3. Then the square of 3 can be expressed as the sum of two consecutive numbers, i.e. 32 = 9 = 4 + 5. Therefore the Pythagorean Triples are {3, 4, 5} since 32 + 42 = 52. Generate another set of Pythagorean Triples starting with the next odd ...
*February 22, 2012*

**algebra**

A DVD player's laser reader helps to "read" the information on the DVD. A particular laser reader measures 0.56 micron thick. Does this fall with the required standards if a company uses |t - 0.03| less than or equal to 0.525 for determining the part to be ...
*February 20, 2012*

**algebra**

a bump on a dvd needs to be between 0.45 and 0.55 micron wide and between 0.95 and 0.99 micron high write two absolute value inequalities describing the width (x) and height (y) of the bump graph each inequality on separate number lines
*February 20, 2012*

**Physics**

i think its 3.7 meters but thats a lil advanced for me so idk
*February 18, 2012*

**Pre-calculus**

If cosx=4/5, cosy=12/13 in Quad. IV, find sin(x+y)
*February 17, 2012*

**Pre-calculus**

If cosx=4/5, cosy=12/13 in Quad. IV, find sin(x+y)
*February 17, 2012*

**Math**

A nickel pyramidal paper weight has a square base of sides 5 cm and a height of 3 cm. What is the mass of a dozen such paper weights if the mass of 1 cm^3 of nickel is 8.9g?
*February 15, 2012*

**geometry**

in traingle FGH, angle 42 is equal to 42 and an exterior angle at vertex H has a measure of 104. What is angle G?
*February 13, 2012*

**Physics**

C = epsilon0*A/d = 8.85*10^-12*0.849/0.001 = 7.51*10^-13 farads Your steps are correct but your answer is miscalculated.
*February 11, 2012*

**algebra 1**

USING EQUATIONS THAT FACTOR How to turn fifteen more than the square of a number is eight times the number into an equation.
*February 9, 2012*

**geometry**

7x over 5 = 42 over 3
*February 8, 2012*

**Chemistry**

972
*February 7, 2012*

**Chemistry**

If a 45.3-g sample of potassium nitrate is dissolved in enough water to make 225 mL of solution, what will be the molarity?
*February 2, 2012*

**trig**

.27
*February 1, 2012*

**Titration Graph?**

Use a spreadsheet to prepare a family of graphs for the titration of 50.0 mL of 0.020 M H2A with 0.100 M NaOH. Consider the following cases: (a) pK1 = 4.00, pK2 = 8.00; (b) pK1 = 4.00, pK2 = 6.00; (c) pK1 = 4.00, pK2 = 5.00.
*January 23, 2012*

**MATH**

Again $25 :P
*January 22, 2012*

**MATH**

Wait my mistake i mean regular price %25
*January 22, 2012*

**MATH**

The regular price is $20. The sale price is $20. What is the discount rate?
*January 22, 2012*

**algebra**

Suppose you have $120 saved up, but spend it at a rate of $8 per week. At what point do you have no money left?
*January 10, 2012*

**English**

Please check.
*January 9, 2012*

**English**

imperative mood
*January 9, 2012*

**English**

indicative mood
*January 9, 2012*

**English**

What is the verb mood of the sentence? Wear your coat when you are in the snow. indicative mood imperative mood subjunctive mood
*January 9, 2012*

**English**

present progressive
*January 9, 2012*

**English**

What is the tense of the underlined verb in the following sentence? "I will be studying his painting techniques this summer." present emphatic present perfect progressive future progressive present progressive under lined verb ( will be studying)
*January 9, 2012*

**English**

Please check my answer.
*January 9, 2012*

**English**

In the following sentence, what kind of phrase is "Moving away"? "Moving awat made my little cousin sad." prepositional gerund infinitive participle
*January 9, 2012*

**English**

Please check.
*January 9, 2012*

**English**

predicate adjective
*January 9, 2012*

**English**

"The grain of the western prairies is a major source of income." direct object indirect object predicate nominative predicate adjective Choose the answer that correctly identifies the underlined word. (source)
*January 9, 2012*

**English**

Please check.
*January 9, 2012*

**English**

predicate nominative
*January 9, 2012*

**English**

predicate adjective
*January 9, 2012*

**English**

"Western Canada also gives us the part of the Kwakiutl Indians." direct object indirect object predicate nominative predicate adjective Choose the answer that correctly identifies the underlined word. (us)
*January 9, 2012*

**English**

Please check for me.
*January 9, 2012*

**English**

participal
*January 9, 2012*

**English**

In the following sentence, what kind of phrase is " to play basketball"? "Porpoises have been to play basketball."
*January 9, 2012*

**English**

Can someone please check my answer.
*January 9, 2012*

**English**

In the following sentence, what kind of phrase is " to the library"? "I will be going to the library soon."
*January 9, 2012*

**math**

Jeremy can type 144 words in 144 min. How many words can he type in 10 min at the same rate. Show work
*December 30, 2011*

**math**

swimsuit discounted 65% on sale for $20.30
*December 18, 2011*

**math**

70 pennies decreased by 20%
*December 18, 2011*

**science**

how adipose tissue function when nutrients are plentiful and scarce. Describe what happens to this tissue during a weight loss program and why it’s difficult to keep the lost weight off. Discuss liposuction and state if this is a good method to decrease the amount of ...
*December 18, 2011*

**math**

42 customers increased by 50%
*December 18, 2011*

**College Algebra**

using the knowledge of systems of equations, and that the equation of a circle is (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center and r is the radius. Find the equation of a circle that contains the following points: (6,2), (4,6), and (-3,5). (These 3 points each create an ...
*December 15, 2011*

**College Algebra**

using the knowledge of systems of equations, and that the equation of a circle is (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center and r is the radius. Find the equation of a circle that contains the following points: (6,2), (4,6), and (-3,5). (These 3 points each create an ...
*December 15, 2011*

**math**

Find all roots of P(x)= X^4 - 7/2 X^3 + 6x^2 -28x -16
*December 14, 2011*

**Math**

5 hockey pucks and three hockey sticks cost $23. 5 hockey pucks and 1 hockey stick cost $20. How much does 1 hockey puck cost?
*December 1, 2011*

**phi 103**

. Logicians regard the following as the meaning of the word "argument
*November 26, 2011*

**Algebra1**

Kevin has a total of 92 coin collection .this 8 more than three times the number of quarters in the collections .How many quarters does Kevin have in his collections
*November 22, 2011*

**College Chemistry**

What volume of 0.1125 M K2Cr2O7 would be required to oxidize 48.16 mL of 0.1006 M Na2SO3 in acidic solution? The products include Cr3+ and SO42- ions.
*November 21, 2011*

**chemistry**

4g of h2 reacts 70 g of ci2 and forms
*November 16, 2011*

**Biochemistry (BCMB)**

Waste gases containing CO2 from power stations are sometimes pumped through pools containing an aquatic green unicellular alga, such as Chlorella. Explain two benefits of this.
*November 15, 2011*

**Physics**

A high school cheerleader has a baton that is 1 meter long with a 100 gram mass on each end. Another cheerleader has a baton that is 0.5 meter long with the same mass on each end. Neglecting the mass of the rod holding the masses together, which baton will be easier to spin ...
*November 15, 2011*

**Biochemistry (BCMB)**

Why do plants go on to manufacture energy-rich sugars when they already have ATP and NADPH for chemical energy from light reactions of photosynthesis?
*November 15, 2011*

**CHEMISTRY**

well for the first one, should the answer be... K = [H2O]^2 ----------- [H2]^2 + [O2] or should it just be... K = [H2O]^2?
*November 14, 2011*

**CHEMISTRY**

(Re-post) Write the equilibrium constant expression, K, for each of the following reactions. Where appropriate, designate the K as Ksp. 2H2(g) + O2(g)<-->2H2O(g) 2Hg(l) + Cl2(g) <-->Hg2Cl2(s)
*November 14, 2011*

**Chemistry**

Write the equilibrium constant expression, K, for each of the following reactions. Where appropriate, designate the K as Ksp. 2H2(g) + O2(g)<-->2H2O(g) 2Hg(l) + Cl2(g) <-->Hg2Cl2(s)
*November 14, 2011*

**Trig**

I have these sum and product property problems and I just want to make sure my work is right. Write equations expressing 1. cos 37degrees cos99degrees as a sum Answer: sin136+(-62) 2. sin4+sin7 as a product Answer: 2sin5.5 sin-1.5 3. cos 8x - cos 2x as a product Answer -...
*November 13, 2011*

**trig**

I have these sum and product property problems and I just want to make sure my work is right. Write equations expressing 1. cos 37degrees cos99degrees as a sum Answer: sin136+(-62) 2. sin4+sin7 as a product Answer: 2sin5.5 sin-1.5 3. cos 8x - cos 2x as a product Answer -2sin5x...
*November 11, 2011*

**Algebra**

7.5+y<13
*November 9, 2011*

**Algebra**

7.5+y<13
*November 9, 2011*

**Mathematics**

If a piece of wood is 5 cm longer than a second piece, and 3/4 of the second piece is equal to 3/5 of the first, what is the length of the second piece? Explain your workings
*November 9, 2011*

**Chemistry**

Calculate the solubility of AgCl in the following solution: 100mL of .004 M CaCl2
*November 7, 2011*

**Chemistry**

(Qualitative Analysis) I know this is vague, but if i had a solution of unknown cations that appear light purple, what could be the possible list of cations in the solution? I thought Mn, Ag, Cu after doing my own tests, but i am uncertain. Just on a visual analysis though, ...
*November 7, 2011*

**Chem 152**

if x moles of PbCl2(s) dissolve in 1.00L of water, how many moles of Pb2+(aq) are produced? how many Cl- produced?
*November 3, 2011*

**Science **

Technology has been used for centuries to study the ocean. Trace the history of one piece of technology. What do you think is the most important technology to study the ocean? And why do you think so?
*November 3, 2011*

**Math**

How does knowing 26=30 - 4 help you find 7+26?
*November 2, 2011*

**English**

Is "sinecure" used correctly in this sentence: He studied hard throughout college to get a sinecure job.
*October 30, 2011*

**English**

Is "impinge" used correctly in this sentence: Studying Latin every day impinged her grades in both Latin and English.
*October 30, 2011*

**English**

thanks
*October 30, 2011*

**English**

Does this sentence use "Reverberate" correctly?: The sound of thunder kept reverberated in his head.
*October 30, 2011*

**English**

Is anarchy used correctly in this sentence? : As so as the teacher step out of the class room to copys some paper the class was in a state of anarchy.
*October 27, 2011*

**math**

500x93x35+9999999999x99999999=
*October 27, 2011*

**chemistry**

(Re-posting because no one was answering chemistry questions) if you have 100mL of 0.1M acetic acid (ka = 1.8x10(-5)what is the pH after 10mL NaOH is added? I came up with an answer of 2.895, but i'm not sure if its right.
*October 27, 2011*

**Chemistry**

if you have 100mL of 0.1M acetic acid (ka = 1.8x10(-5)what is the pH after 10mL NaOH is added? I came up with an answer of 2.895, but i'm not sure if its right.
*October 26, 2011*

**Chemistry**

Ok, moving on from my last question, you have 100mL of 0.10M acetic acid with ka = 1.8x10(-5) and add 50mL (0.10M) NaOH.
*October 25, 2011*

**Maths**

This is saying that Kelly's sister is 1/2 the height of 144cm. 144/2=72cm So her sister is 72cm. if you want to convert this to inches, one inch equals 2.54cm.
*October 25, 2011*

**Chemistry**

Calculate the pH of a 100mL solution of 0.10M acetic acid ka=1.8x10(-5) i calculated the pH to be 2.87 from the square root of (1.8x10(-5) * 0.1, the negative log gives me the pH. The next question wants you to calculate the pH with 50mL HCl added. I found the pH to be 2.78 by...
*October 25, 2011*

**nath**

1/10 plus 1/10 gives you 2/10 or 1/5
*October 25, 2011*

**statistics**

The first answer is still correct based on trend so i would go with that
*October 20, 2011*

**statistics**

though if you're going off of the mean (average) week 4 would get 55 customers oddly enough the median (middle number) is 55 as well. There is no mode (most common number) to calc. average, 30+55+80=165/3=55
*October 20, 2011*

**Chemistry**

so i had to calculate the pH of a 100ml solution of .10M acetic acid (ka=1.8x10(-5) I came out to 2.87. But then, they want the pH if 50ml HCL is added. So i thought...Ka = x2/.15M, therefore the square root of .15M x 1.8x10(-5) = .00164(concentration). So -log(.00164) = 2.78...
*October 20, 2011*

**earth**

circumference of a cirle = pi x diameter. pi = 3.1415926535 (or just use pi button on calculator) Diameter = 2 x radius radius = 6380 (+620) or 7000km now you have all the info you need, plug in the numbers
*October 20, 2011*

**Chemistry Help!!**

I believe the elements with 8 electrons should be the noble gasses. Argon, Krypton,...etc.
*October 20, 2011*

**Chemistry**

Consider a 0.80M solution of HCN. The Ka of HCN is 6.2x10-10. What are the major species in solution? Calculate the pH of this solution. ----------------------------------- Ok, so i took a break, came back, and finished the problem. I have an x value of 2.23x10-5. I took the ...
*October 18, 2011*

**Chemistry**

Consider a 0.80M solution of HCN. The Ka of HCN is 6.2x10-10. What are the major species in solution? Calculate the pH of this solution.
*October 18, 2011*

**Chemistry**

What happens to the hydroxide ion concentration in aqueous solutions when we increase the hydrogen ion concentration by adding an acid? Would it be good enough to answer by stating that the OH- ion concentration decreases, lowering the pH?
*October 18, 2011*

**Chemistry**

So if i want to write the conjugate base for NH3, NH3 <--> NH2 + H(+)
*October 17, 2011*

**Chemistry**

Doing some practice problems, these are a couple of my answers. Are these written correctly? Write the conjugate acid: a)HPO4(2-) Answer: HPO4(2-) + H(+) --> H2PO4(-) b)NO2(-) Answer: NO2(-)+ H(+) --> HNO2
*October 17, 2011*

**5th grade math**

17 in the 10th
*October 12, 2011*

**impact math**

explain how you could find a decimal equivalent to 9/20
*October 12, 2011*

**Chemistry**

Consider 2 separate solutions, one of a weak acid HA and one of HCL. Assume that you started with 10 molecules of each. Draw a picture of what each solution looks like at equilibrium. Ok to my very limited knowledge on this subject so far, a weak acid at equilibrium should ...
*October 11, 2011*

**Social studies**

Can you please list so reason why the Reformation of the 16th century was a religious movement?
*October 10, 2011*

**algebra**

The actual room has an area of 166ft2 and one of the sides, s, measures 13ft. Side s corresponds to side m of your model and m = 2ft. In order for your model to have the same proportions as the actual room, what is the required area of your model room?
*October 9, 2011*

**Technology**

Can you give three examples of bad print media advertisement? Can you give me the link for the bad advertisement?
*October 9, 2011*

**calculus**

express u(t)=Tant/1+Tant in F of G
*October 4, 2011*

**College Math**

how to do sets
*October 2, 2011*

**business**

A loan of face value $30,000,000 is issued in bonds each face value $300. The bonds will be repaid with a bonus of 20%. 1/5th of the total capital will be repaid each year, the first payment being at the end of the 10th year. Coupons on the outstanding bonds are 7% p.a. paid ...
*September 29, 2011*