Monday

September 1, 2014

September 1, 2014

Total # Posts: 813

**algebra**

Let D = {(a,b,2a): a,b all real numbers} The set of vectors in R^3 with last entry twice the first. E = span{(1,0,2),(2,-1,4),(0,-3,0)} Prove that D = E I first made an augmented matrix to find out that there is a free variable of x3. Showing that there is a solution where D ...
*June 7, 2013*

**math**

Adam took five tests and received a grade for each of them. The first test was 92%, the second test was 83%, and the mean of the five tests was 85%. What can you conclude? a. the lowest test score. b. the highest test score. c. the mean of the last three tests. d. the mean of ...
*June 4, 2013*

**math**

Determine the 10th term of the sequence 3,10,28,72,176. state the general term
*June 3, 2013*

**medical coding**

what is the icd9 procedure for suture repair with layered closure of the hand 4.0cm
*May 27, 2013*

**english**

we went to their Fifteith anniversary is 50th capitalized?
*May 21, 2013*

**7th Grade Math**

A pentagonal prism has dimensions that are four times the dimensions of a similar pentagonal prism. So its volume is _____times the volume of the smaller prism. A) 64 B) 8 C)16 D)4 Would it be A) 64? Next Question: If the dimensions of a cylinder are doubled the surface area ...
*May 20, 2013*

**7TH GRADE MATH**

If the radius of a cylinder is 1.8 meters and its height is 7 meters, the volume of the cylinder is approximately 71.2 cubic meters...true or false I say false because shouldn't it be 71.2 cubic 3? Am I correct?
*May 19, 2013*

**college algebra I**

4v=68 v=68/4 v=17 Vanessa is 17 years old
*May 13, 2013*

**Math**

The area of a hexagon is 42 square cm. If all the dimesions of the hexagon are multiplied by 3, what will be the area of the new figure? a) 126 cm2 b) 252 cm2, c) 378 cm 2 d) 14 cm2 I took 42 cm x 3 and got 126 cm2 did I work this correctly?
*May 7, 2013*

**Algebra 1**

You can mow your whole lawn in 45 minutes, and your neighbor can mow your whole lawn in 30 minutes. How long would it take you to mow the lawn together? Clearly show and explain each step for full credit. Using rational applications A. Write an equation that could be used to ...
*May 5, 2013*

**Math**

Ariel's garden is planted in the shape of a square and has an area of 81 square feet. If she plans to put a fence around the perimeter of the garden, how much fencing will she need? A) 18 ft, B) 41 ft C) 36 ft D) 9Ft I came up with D 9 foot but apparently I didn't work...
*May 1, 2013*

**7th Grade Math**

If a diameter of a circle (which is 18 inches) is tripled, can the expression 9 (254.34 in square) be used to find the new circle? I know the answer is yes but I can't figure out how you work it! I come with 9(1,107.36 in square) but apparently that is not correct.... ...
*April 30, 2013*

**Chemistry**

imagine that you have a 100 ml of HCl, after adding 50 ml of 1M NaOH, how many moles of OH did you add
*April 29, 2013*

**Chemistry**

imagine that you have a 100 ml of HCl, after adding 50 ml of 1M NaOH, how many moles of OH did you add
*April 29, 2013*

**Math**

A quarter has a diameter of approximately 24 millimeters. What is the area of the quarter? Did I work this right? A= 3.14 (12) A=3.14 (144) A-452.16 mm Thanks
*April 26, 2013*

**math**

Jeff takes a loan of R25000 in a period of 5years calculate the interest rate?
*April 26, 2013*

**math**

9 fair coins are independently tossed in a row. Let X be the random variable denoting the number of instances in which a Head is immediately followed by a Tail during these 9 tosses. The variance of X has the form ab, where a and b are coprime integers. What is the value of a+b?
*April 18, 2013*

**math 4th grade**

then what do i do with 16/24 and 15/24
*April 16, 2013*

**math 4th grade**

how do you add 2/3 plus 5/8
*April 16, 2013*

**science**

calculate the time taken by a train to travel 1000m if its initial speed is 30m/s and it has an acceralation of 0.1m/s
*April 16, 2013*

**Chemistry**

DrBob222's answer is wrong. You mean to put Cd/Cd^2+ is -0.403, not 0.403. Answer is: 3Cd^2+(aq) + 2In(s) --> 3Cd(s) + 2In^3+(aq) this is right because the short hand notation is: In(s)|In^3+ (aq)||Cd^2+ (aq)|Cd(s) And the Anode is always on the left. ~Information valid...
*April 14, 2013*

**Math**

If (Y x 15+20=245), what does Y equal?
*April 14, 2013*

**Calculus**

Estimate the area under the graph of 25−x 2 from x = 0 to x = 5 using 5 left rectangles. b. Sketch for yourself the graph of f and the rectangles. Is this left sum an overestimate or underestimate? Enter OVER or UNDER. c. Now use 5 right rectangles to estimate the area. ...
*April 12, 2013*

**Math**

In 1800, the area of the United States was 891,364 square miles. After the Louisiana Purchase in1803,the area increased by about 93%. What was the area of the United States after the Louisiana Purchase? Round to the nearest square mile
*April 11, 2013*

**Calculus**

An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?
*April 11, 2013*

**Calculus**

An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?
*April 11, 2013*

**english**

Mrs. Jones said that we will have a fire drill at 8:45 on Thursday. I am confused is what she said in quotes and should the word that be taken out - the instructions says to correct sentence.
*April 9, 2013*

**english**

Sam and John are building a new house in Florida. is it house or home?
*April 9, 2013*

**english**

How many fish do you want to catch?" The fishing guide asked us. is the T in the capitalized
*April 9, 2013*

**math**

Wondering the answers to these: Find the value of each of the following. Leave your answers as fractions where appropriate. [I did these myself but need to answer-check] a) log[base4](1/8) b) 10^(-10log3) c) 2log[base3](9) d) log[base3](3)^(2x) ans: a) -3/2 b)(1/3)^10 c) 4 d)...
*April 7, 2013*

**chemistry**

What are the freezing point and boiling point of an aqueous solution of 15.5 g glucose(C6H12O6) dissolved in 150 g of water?
*April 7, 2013*

**chemistry**

How many grams of H2SO4 are contained in 4.5 L of .30N (N standing for normality) sulfuric acid? Help would be much appreciated.
*April 7, 2013*

**math**

Great this helps alot, was worried I screwed up something
*April 7, 2013*

**math**

The Question is: The value of a new car depreciates at a rate of 12% per year. 1)Write an equation to represent the approximate value of a car purchased for $23 000. 2)Determine the value of the car two years after it is purchased. 3)Approximately how many years will it take ...
*April 7, 2013*

**math**

Thanks, glad I can correct that!
*April 7, 2013*

**math**

One more question: Beginning with the function f(x) = (0.8)^(x), state what transformations were used on this to obtain the functions given below. a) g(x) = - (0.8)^(x) - 2 b) h(x) = (1/2) (0.8)^(x-2) c) k(x) = (0.8)^(-3x+9) These are the answers I have, (may be incorrect) a) ...
*April 7, 2013*

**math**

Wow thanks guys, perfect feedback. Much appreciated
*April 7, 2013*

**math**

Confused! So here is the question: Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately $0.90. What will it cost to fill a 60 litre gas tank 10 years from now. Round your answer to the nearest ...
*April 7, 2013*

**math**

Thank you very much.
*April 7, 2013*

**math**

An antique dresser was purchased for $7500 in 2005. The dresser increases in value by 9% per year. Find the value of the dresser in 2025. So i thought it would be : A = 7500(1+0.09)^(20) A = 42033... However I have been told it could be: Value = 7500 + 7500*0.09*20 = $21,000 ...
*April 7, 2013*

**math**

..?
*April 6, 2013*

**math**

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. No there is no common side (lets say.) Thanks
*April 6, 2013*

**math**

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. No there is no common side (lets say.) Thanks
*April 5, 2013*

**math**

No there is no common side (lets say.) Thanks by the way.
*April 5, 2013*

**math**

That is the question, it can be solved in multiple ways from what I understand.
*April 5, 2013*

**math**

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension.
*April 5, 2013*

**math**

it would be appreciated
*April 5, 2013*

**math**

This is for calculus and its a practice assignment. I need a how-to on solving these. Each answer must be a function.
*April 5, 2013*

**math**

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. 2) A container company is designing on open-top, square-based, rectangular...
*April 5, 2013*

**CHM 0001**

Put some sample of the salt in a dry test tube, and heat. You will observed that water vapour is giving out which turn white copper sulphate blue. That shows that the salt contain some water of crystalization. Add distilled(5cm3) water to some of the sample into a test tube ...
*April 4, 2013*

**math**

Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately $0.90. What will it cost to fill a 60 litre gas tank 10 years from now. Round your answer to the nearest dollar. Name at least one thing other ...
*April 2, 2013*

**Statistics**

Hello. I would like to ask a college statistics question. Q. One hundred draws are made at random with replacement from the box [1,2,2,5]. The draws come out as follows:17 [1]'s, 54 [2]'s, 29 [5]'s. Fill in the blanks, using the options below; show work. (a) For ...
*March 28, 2013*

**Math**

What are five numbers that have a median of 71,300
*March 25, 2013*

**University of Ghana**

• A car moves 26 km due east then 14 km due north. It then turns along a path running north-west with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs. • Find; • (a) the car’s average speed in m/s • (b) the car’s average ...
*March 23, 2013*

**math 3rd grade**

Input X Output Y 1 1 3 9 5 25 write a rule for each function table 8x - 15 is this correct??? HELP
*March 13, 2013*

**calculus**

find the exact length of the curve y = ln(1-x^2), 0 <= x <= (1/2) So by doing the work I eventually get down to integral from 0 to 1/2 (1 + x^2)/(1-x^2) dx but I keep getting -1 + 1/(x-1) - 1/(x+1) after partial fractions which gives the answer ln(1/3) - 1/2 when I ...
*March 13, 2013*

**science**

what is the momentum of a 0.60 g bumble bee flying at 15km/h
*March 12, 2013*

**World Mythology**

Discuss what the Egyptian stories of Isis, Osiris, and Horus reveal about Egyptian culture and what The Enuma elish reveals about Babylonian culture. How, in particular, do their stories reflect the beliefs of their respective peoples?
*March 10, 2013*

**Statistics**

In the quiz in Exercises 1 and 2, the grading scheme is as follows: each right answer is awarded 5 points, and 1 point is taken off for each wrong answer. Recall that the quiz consists of 10 questions, and that in the class, the average number of right answers is 6.2 and the ...
*March 7, 2013*

**Statistics**

A quiz consists of 10 questions. Each question is marked either “right” or “wrong.” For each student in the class, the instructor keeps a record of the number of right answers the student got. In the class, the average number of right answers is 6.2 and the...
*March 7, 2013*

**Statistics**

A list of numbers has an average of 48 and an SD of 12. The list is transformed by subtracting 3 from each entry and then dividing the result by 5. (1) Find the average of the transformed list. (2) Find the SD of the transformed list.
*March 7, 2013*

**calculus**

Sorry I typed out the wrong answer. Why would I have 3 fractions though? Because it's x^2?
*March 2, 2013*

**calculus**

Integral of 10 / (5x^2 - 2x^3) Do not determine the numerical values of the coefficients. Just wanted to know why when I write out the form of the partial fraction decomposition there is A/x + B/x^3 + C/ (x^2 + 4) Why isn't it just A/x^3 + B/ (x^2 + 4)?
*March 2, 2013*

**Algebra 1**

Clearly show and explain each step for full credit. solve the inequality |4x-3|=5
*February 28, 2013*

**Chemistry**

Experimentaly discribe how to determine the formula of magnesium.
*February 24, 2013*

**calculus**

How is the integral of cos(2x) = sinxcosx?
*February 21, 2013*

**Physics**

Two negative charges each of unit magnitude and a positive charge q are placed along a straight line. At what value of q will the system be in equilibrium? Check whether it is stable, unstable or neutral equilibrium.
*February 16, 2013*

**Math**

Actual lengths of pregnancy terms are nearly normally distributed about a mean pregnancy length (of about 38-39 weeks) with a standard deviation of 15 days: about what percentage of births would be expected to occur within 15 days of the mean pregnancy length?
*February 12, 2013*

**Math**

.0279775281
*February 12, 2013*

**cherokee**

12.00*.25=3 so 12.00-3.00= sale price of $9.00
*February 12, 2013*

**calculus**

I'm talking about in a general sense. Let's say it's y = x^2 and y = 2x- x^2. Will it always be the upper bound curve that is the top one?
*February 3, 2013*

**calculus**

How do I tell which curve is the top/bot or right/left? I keep getting confused about this. Is it just the right/top most intersection and the bot/left most one?
*February 3, 2013*

**Chemistry**

For the reaction of hydrazine (N2H4) in water, Kb is 3.0 10-6. H2NNH2(aq) + H2O(l)--> H2NNH3+(aq) + OH-(aq) Calculate the concentrations of all species and the pH of a 1.6 M solution of hydrazine in water. [OH-] = [H2NNH3+] = [H2NNH2] = [H+] = pH =
*February 3, 2013*

**American History**

docs(DOT)google(DOT)com/file/d/0B3_sydO5xXRZOUpwTVZIbUdvNXM/edit I have to write a childrens book(3rd-4th grader) for a history project. I have to somehow incorperate/represent the cold war, containment, truman doctrine, domino theory, and korean war. I don't even have any...
*January 24, 2013*

**English**

Because of the lawyer's long experience in legal matters, we left it to his BLANK how to proceed with the case
*January 22, 2013*

**chemistry**

since 315g of Pb(NO3)2 is yielded 278g of PbCl2 hence, xg of Pb(NO3)2 would yield 9g of PbCl2 it can be represented as below; 315g Pb(NO3)2 = 278g of PbCl2 xg of Pb(NO3) = 9g of PbCl2 cross multiply x = 315g x 9g divided by 278g x= 10.197g therefore, 10.197g of Pb(NO3)2 would ...
*January 20, 2013*

**Geometry honors**

the endpoints of AB are a(-3,5) and b(9,15). find the coordinates of the points that divide AB into 4 congruent segments
*January 16, 2013*

**Physics**

For a certain transverse wave, the distance between two successive maxima is 1.82 meters and eight maxima pass a given point along the direction of travel every 14.2 seconds. Calculate the wave speed. Answer in units of m/s
*December 31, 2012*

**Physics**

is 41 degrees east of north the exact degree number??? because a computer program wants the exact number and i cant round over or under 1%...
*December 30, 2012*

**Physics**

An airplane ﬂies at airspeed (relative to the air) of 430 km/h . The pilot wishes to ﬂy due North (relative to the ground) but there is a 43 km/h wind blowing Southwest (direction 225◦). In what direction should the pilot head the plane (measured clockwise ...
*December 30, 2012*

**physics**

6 seconds
*December 23, 2012*

**english**

ok umm thanks....
*November 29, 2012*

**english**

what is the subject and verb phrase of "Go to the snack bar before the movie"
*November 29, 2012*

**algebra - absolute value**

it could be a no solution answer??
*November 29, 2012*

**math**

Please explain the order of operations for the formula 30 divided by 5 times 6 Do I do the multiplication first, or do I do the the operations from left to right?
*November 28, 2012*

**financial accounting **

eckman company purchased equipment for $80,000 on january 1,2011 and will use the double declining balance method of depreciation. it is estimated that the equipment will have a 5 year life and a $4,000 salvage value at the end of its useful life. the amount of depreciation ...
*November 19, 2012*

**Chemistry**

How many possible orbitals are there for n= 4?
*November 18, 2012*

**Chemistry**

Calculate the energy change associated with the transition of an electron from the n=2 shell to the n=5 shell in a Bohr hydrogen atom.
*November 18, 2012*

**math**

the width in cm of a rectangle is the same as the slope of the line 5x-6y=-14, and its length in cm is the same as the slope of the line that is perpendicular to the line 9x+4y=87. Find the perimeter of the rectangle.
*November 17, 2012*

**math**

the width in cm of a rectangle is the same as the slope of the line 5x-6y=-14, and its length in cm is the same as the slope of the line that is perpendicular to the line 9x+4y=87. Find the perimeter of the rectangle.
*November 17, 2012*

**math**

Find the equation of the line that passes through the points (2/3, -5/4)and (-3, -5/6). Write the answer in slope-intercept form and standard form with integer coefficients. Thank you.
*November 16, 2012*

**math**

If there are 8 boys and 9 girls in a classroom , what is the ratio of boys to girls ?
*November 6, 2012*

**History**

What made iroquois headwomen different from regular Iroquois woman
*November 3, 2012*

**mg495**

You learn that 25 percent of the cost of goods sold and operating expense figures for 2009 are fixed costs that will not change in 2010. Reconstruct the pro forma income statement.
*November 1, 2012*

**akgebra**

when do you reverse an inequality sign?
*October 31, 2012*

**CHEMISTRY**

Are you always solving for final volume in the combined gas law?
*October 23, 2012*

**Physics**

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
*October 23, 2012*

**College Physics**

A uniform horizontal rod of mass M and length l rotates with angular velocity w (omega) about a vertical axis through its center. Attached to each end of the rod is a small mass m. Determine the angular momentum of the system about the axis. Write you're answer in terms of...
*October 20, 2012*

**English grammar **

"Will you lend me seven dollars for my lunch today? " asked Shannon. Is there a question mark after today or a comma
*October 18, 2012*

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