# Posts by shawn

Total # Posts: 577

**math check question**

Subtract and Simplify: 4a^2/(a-b)-(4b^2-8ab)/(b-a) I have the answer as 4(a+b)^2/(a-b) or should it be 4(a-b)^2/(a-b) Responses Math problem check - bobpursley, Sunday, October 12, 2008 at 4:23pm just the numerator.. 4a^2-8ab + 4b^2, right? 4(a-b)^2 Now does that reduce with ...

**Math problem check**

What about 4a^2/(a-b)-(4b^2-8ab)/(b-a) I thought that you would multiple the second part of the equation by -1 -(4b^2-8ab)/(b-a) to get the common LCD of a-b So I thought the equation would be 4a^2/(a-b) + (4b^2 + 8ab)/(a-b) I have the answer as 4(a+b)^2/(a-b)

**Math problem check**

Okay I have the answer as 4(a-b) is that right

**Math problem check**

Subtract and Simplify: 4a^2/(a-b)-(4b^2-8ab)/(b-a) I have the answer as 4(a+b)^2/(a-b) or should it be 4(a-b)^2/(a-b)

**Math problem check**

Simplify: (2/a + 6/b) / (8/ab + 4/a^2) I have the answer as a(3a+b)/(4a+2b) Is that correct?

**Word problem check**

Thank you

**Word problem check**

one summer, Van mowed 4 lawns for every 7 lawns mowed by Fiona. Together they mowed 132 lawns. How many did Fiona mow? I have the answer as 84 is that correct?

**Math problem still stuck**

So you are saying that it is none of the multiple choice answers of -161/8 120/7 161/7 or -17 ?

**Math problem still stuck**

When I plug in the values what am I looking to find?

**Math problem still stuck**

Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I have multiplied the LCD of (a-8)(a+7)(a+22)by both sides with no luck. This is a multiple choice question a.) -161/8 b.) 120/7 c.) ...

**Math check 2**

I got it thanks

**Math check 2**

Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) (t-24) + 7(t+7)=3(t-8) solve for t. The choices are: a.)-97/5 b.)122/5 c.)-13 d.)-13/5 Math ...

**math check**

Thank you

**math check**

I have a problem that I need checked it is the produce of the reciprocals of two consecutive integes is 1/182 Find the integers. I have as the answer -13,-14 or 13,14 is this correct?

**Math word problem**

Thank you I have the answer as 10km/h.

**Math assistance needed**

Thank You. I understand.

**Math assistance needed**

a.)-97/5 is the answer I get is that correct?

**Math assistance needed**

Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) is this correct ot what am I doing wrong? I don't understand the rest so multipy both sides ...

**a problem**

Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) How do I solve this problem

**a problem**

Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) is this correct ot what am I doing wrong?

**Solve**

Okay I understand it now I have to make them have the same denominators so I multiply 1/C by the numerator and denominator by C2 so it would be C2/(C2*C) and the other part is 1/C2 times C which would be C/(C2*C) which would make the problem 1/C1= C2-C/(C2*C) what do I do next?

**Solve**

Yes, I am still having problems with this problem. I understand this part 1/C1 = 1/C - 1/C2 but I don't understand this part: (C2 - C)/(C*C2)

**Solve**

Solve 1/C=1/C1 + 1/C2 for C1 This multiple choice and the listed answers are: a.)C1= CC2/(C2-C) b.)C1= C-C2/C c.)C1= C+C2/CC2 d.)C1= C+C2/C2

**Math another problem**

Solve 1/C=1/C1+1/C2 for C1.

**Math**

Solve: (t+24)/(t^2-t-56)+7/t-8=3/t+7

**possessive noun**

shawn

**Statistics**

A sample of 64 observations is selected from a normal population. the sample mean is 215 and the standard deviation is 15. conduct the following test of hypothosis using the .3 significance level. Ho:u > or = 220 H1: u < 220 a) Is this a 1 tailed or 2 tailed test? b) ...

**college algebra**

h(x)=3xsquared+5x-3

**math**

divide.x^4+x^2-80/x+3

**math**

subtract. 5y^2+2y-9 from 10y^2+3y+5

**math**

solve for x 2(x-5)^2=3

**axia**

peer review appendix g

**Statistics**

Create a Histogram of the following data: Interval Frequency 0 – 5 0 5 - 10 5 10 - 15 5 15 - 20 15 20 - 25 5 25 – 30 10

**graphing**

Determine whether the graphs of the two lines are parallel. y+3=3x 6x-y=-3 Are the graphs of the given equations parallel?

**Business Research and Writing**

Discuss the purpose of journals and professional papers. Discuss the organization of a technical scientific paper.

**algebra 2**

nevermind i got it yea thank you i can do it

**algebra 2**

whats the up arrow thingy mean?

**algebra 2**

opps its log(base2) (x+2)= log(base2) x squared

**algebra 2**

log(base 2) (x=2)= log(base 2)x squared

**algebra 2**

log[little 3] (2x-1)=3

**science**

evidnce for evolution

**chem**

The accepted value for the universal gas constant is 0.0821 L atm/mol K. Wat would it be if the pressure was measured in torr and the volume in milliliters?

**Chem**

i need help getting the equation? i missed a couple of days and im so lost

**us history**

what types of job did women have in the era of reform.

**management of Information Systems**

Create a table that list the strengths and challenges of traditional systems development life cycle, prototyping, rapid application development, and end user system development life cycle."

**science**

During the month of November, it rained on 12 of the 30 days. It also snowed on 3 days. On what percent did it rain? On what percent of days did it snow?

**law**

hi, im having trouble thinking of my own laws. can someone help me out. thank you very much. Some examples: Cell ban in cars, raising lowering an age limit (driving, voting retirement etc.)

**math**

Let X be the population 5 years ago. X*(1.8) = 18,000 X = 10,000

**last problem for checking**

|-8z+4| = 20 z = -2 Again the book's anwser is -2, 3 Apparently I am missing a step. What is it?

**need an answer checked**

|4x-6| = 26 my answer is 5 The book's answer is 8, -5 How did they get that. What did i miss?

**grasping algebra concepts**

My book is showing the solution for graphing a system of linear equations y > 2x - 7 y is greater than or equal to -3x + 7 I see the way they graphed it and both lines intersect at one point. Did the just find -7 and +7 on the line in order to graph or did they solve for y ...

**science**

what instrument is used to measure lenght answer is ten letters A meter stick can measure length.

**quick question regarding equations**

I know there are methods out there but what do you think is the best or easiest method(s) of solving a system of equations. Depends on the coefficients of the equation. If in one of the equations I can solve for one of the variables without having to express it in fractions, I...

**Weird question**

Why is the line of the inequality solid when <= or >= and dotted when < or >? It is a representation. If <=, the equal says the values can be on the line. If dotted, they cannot be on the line, but only < or > (ie, dotted means values on either side of the...

**Algebra**

Find two consecutive even integers that have a sum of 450. 224+226=450 If two consecutive even integers, x and x + 2, add up to 450, then 2x + 2 = 450 2x = 448 x = 224 is the smallest of the two. Okay thanks.

**GENERAL CHEMISTRY**

CALCULATE THE pH AND HYDROLYSIS IN 0.10 M AlCl3 SOLUTION.Ka = 1.2 X 10-5 FOR [Al(OH2)6]+3,OFTEN ABBREVIATED Al+3.TELL WHETHER pH IS ACID OR BASE.GIVE IONIC EQUATION. Help us a little by telling us how much you know to do and exactly what you don't understand about the ...

**Business and Technology**

Tariffs help us to maintain a favorable balance of trade and balance of payments

**Sociology**

were do california supreme court get their laws from

**Econ MC**

Suppose that the equilibrium price in the market for widgets is $5. If a law reduced the maximum legal price for widgets to $4, a. consumer surplus would necessarily increase even if the lower price resulted in a shortage of widgets. b. consumer surplus would necessarily ...

**Econ**

At Nick's Bakery, the cost to make his homemade chocolate cake is $3 per cake. He sells three and receives a total of $21 worth of producer surplus. Nick must be selling his cakes for a. $2 each. b. $7 each. c. $8 each. d. $10 each. i can't figure this question out. ...

**Math**

When it is said "Y as a funtion of X" does it mean y=f(x) eg. y=2x+3 or x=f(y) eg. x=2y+3 the first one is right

**MATH**

Find the volumes of the solids generated by revolving the region in the first quadrant bounded by the following about the given axes. x = y - y3, x = 1, y = 1 (b) Revolved about the y-axis ? Hi Shawn, 97/105 * pi ? :) We need to cut away the volume of the region you get by ...

**Chem**

Nitric acid is produced commercially by the Ostwald process, represented by the following equations: 4NH3(g) + 5O2(g) > 4NO(g) + 6H2O(g) 2NO(g) + O2(g) > 2NO2 (g) 3NO2(g) + H2O(l) > 2HNO3(aq) + NO(g) What mass of NH3 must be used to produce 1.0x10^6 kg HNO3 by the ...

**math**

when you are multiplying an equation how do you find like terms The ones that look alike. The numbers are like terms such as 4 or 8 or 10. The variables are like terms such as 4x or 9x or 3x but both of these like terms are different still from say 4x^2 or 19x^3. Another way ...

**biochemistry**

The phenomenon of coupling always involves ? oxidation and reduction reactions decarboxylation reactions reactions that produce energy and related reactions that require energy esterification and oxidation reactions None of the above

**Chem**

Nitric acid is produced commercially by the Ostwald process, represented by the following equations: 4NH3(g) + 5O2(g) > 4NO(g) + 6H2O(g) 2NO(g) + O2(g) > 2NO2 (g) 3NO2(g) + H2O(l) > 2HNO3(aq) + NO(g) What mass of NH3 must be used to produce 1.0x10^6 kg HNO3 by the ...

**Biochemistry**

True or False Cofactors and coenzymes are usually larger than enzymes and participate in catalysis . http://en.wikipedia.org/wiki/Coenzyme Notice the 3rd word under the definition when at the above site.

**Biochemistry**

True or False? Allosteric inhibitors always bind to the active site of an enzyme. http://www.mansfield.ohio-state.edu/~sabedon/biol1045.htm Scroll to 15 when at the site I've provided

**Math - 8th grade**

We are just starting this section, and I'm confused...Please help me understand how to solve this inequality: (one fifth r is less than two) 1/5r < 2 Also, simplify: (the #s are exponents) z3 . z3 x12/x3 By 1/5r you mean r/5 or 1/(5r)? z^3 . z^3 = z^6 x^12/x^3 = x^9 If ...

**ap chemistry**

Answer: In order to have a dipole moment (i.e., to be a polar molecule) a molecule must have polar bonds and must have a molecular geometry which is not symmetrical (i.e., one in which the vector sum of the bond dipoles 0). In CH2F2 the C-F and C-H bonds are polar and...

**history**

Why was the oil derrick built? http://en.wikipedia.org/wiki/Derrick_(lifting_device)

**history**

In what city was the first oil derrick built in texas?

**history**

I,m doing research on the oil derricks and pumping unit and need to know what material the first oil derrick was made from in Texas Since this is not my area of expertise, I searched Google under the key words "oil derrick history Texas" to get these possible sources...

**Vocab/spelling**

I need help I do Not understand the difference between country"s ,countrie"s, and countries? can some one help it is the same

**Antiderivative**

What is the antiderivative of e^2x? I know the antiderivative of e^x is e^x. Would e^2x's antiderivative still be e^2x?? You want F(x) such that F'(x)=e^2x Try F = (1/2)e^2x + C =(e^2x)/2 =(e^2x)/2

**geography**

what flatlands extend south from cheapsake bay to the east coast of florida? That region is often called the Inner Banks. This distinguishes it from the Outer Banks, which are barrier islands.

**peer review**

what are some advantages for both the reviewer and writer of peer reviews The author of a work that is reviewed by his/her peers gains prestige and legitimacy by having knowledgable people comment and review his work. The peers also can correct any errors in his work. The ...