Monday

April 27, 2015

April 27, 2015

Total # Posts: 811

**chemistry**

Baking soda is sodium bicarbonate, NaHCO3, and vinegar is primarily acetic acid, HC2H3O2. When baking soda is added to vinegar, the resulting reaction produces a tremendous amount of gas, as shown in this video. Complete this equation for the reaction of NaHCO3(s) with HC2H3O2...
*April 19, 2013*

**chemistry**

Write the net ionic equation (including phases) that corresponds to Fe(ClO4)2(aq)+Na2S(aq)=FeS(s)+2NaClO4(aq)
*April 19, 2013*

**chemistry**

59.0 mL of a 1.40 M solution is diluted to a total volume of 278 mL. A 139-mL portion of that solution is diluted by adding 129 mL of water. What is the final concentration? Assume the volumes are additive.
*April 17, 2013*

**chemistry**

Write the balanced chemical equation for the Habor-Bosch process, that is, the combination of nitrogen and hydrogen to form ammonia, NH3. Phase symbols are optional.
*April 17, 2013*

**chemistry**

Write the equation for the decomposition of water into its elements. Phase symbols are not graded.
*April 17, 2013*

**chemistry**

What NaCl concentration results when 279 mL of a 0.640 M NaCl solution is mixed with 427 mL of a 0.490 M NaCl solution?
*April 17, 2013*

**chemistry**

You have 67.0 mL of a 0.400 M stock solution that must be diluted to 0.100 M. Assuming the volumes are additive, how much water should you add?
*April 17, 2013*

**math**

the world record for the men's long jump is 29 3/8 feet. the women's record for the same event is 24 88/48 feet. How many feet longer is the men's record?
*April 8, 2013*

**economics**

A subsidy is a grant given by one party
*April 5, 2013*

**algebra**

So tired of asking for help ane never getting it. Whats the purpose of this site then?
*April 4, 2013*

**algebra**

For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below. Use the code [1,-2_-3,7] encode the phrase "ONE QUESTION TO GO" The matrix C=[1,-2_-3,7] was used to encode a phrase to [7,-28,-25,-35,-2_-21,107,90,123,17...
*April 4, 2013*

**algebra**

For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below. Use the code [1,-2_-3,7] encode the phrase "ONE QUESTION TO GO" The matrix C=[1,-2_-3,7] was used to encode a phrase to [7,-28,-25,-35,-2_-21,107,90,123,17...
*April 2, 2013*

**algebra**

Ok I see I was not multiplying the right numbers. Thanks for clarifying for me.
*April 2, 2013*

**algebra**

Can anyone help explain how to work this problem out? One factor in flood safety along a levee is the area that will absorb water should the levee break. the coordinates that make up the boundry area are (0,0),(2.8,2.1)and(4.3,4.4) what is the area of the land that would ...
*April 2, 2013*

**chemistry**

determine how many grams of N2 are produced by 9.12 g of H2O2 and 6.90 g of N2H4. 2H2O2+N2H4= 4H2O+N2
*April 1, 2013*

**American history**

The history of philosophy would describe Immanuel Kant as a (Points : 1) medieval philosopher. contemporary philosopher. modern philosopher. classical philosopher.
*March 31, 2013*

**math**

The range of f(x) = ax + b is the set of all real numbers given that a and b are real numbers. Which produces a counter example to her statement?
*March 31, 2013*

**Unknow**

And Ms.sue. Your wrong. Cause if the length is 16 then the width is 8 and that will equal 24. Nice try
*March 27, 2013*

**Unknow**

Its not a school subject. its college
*March 27, 2013*

**Unknow**

A man has a rectangular garden. One length of the garden lies along a patio wall. However the rest of the garden is enclosed by 32 feet of fencing. If the length of the garden is twice its width, what is the area of the garden.
*March 27, 2013*

**Algebra**

Can someone please help me with a couple questions? 1)The probability that a dessert sold at a certain cafe contains chocolate is 73%. The probability that a dessert containing chocolate also contains nuts is 25%. Find the probability that a dessert at random contains nuts ...
*March 24, 2013*

**Chemistry**

True or false? The calorie is defined as the amount of energy (heat) required to raise the temperature of one gram of water by one degree Celsius.
*March 14, 2013*

**Math**

The outstanding balance on Bill's credit card account is 3690 dollars. The bank issuing the credit card is charging 21 percent of interest per year compounded monthly. If Bill decides to pay off his balance in equal monthly installments at the end of each month for the ...
*March 9, 2013*

**Mathematics of Finance**

Richard borrowed 170000 dollars from his bank to help finance the purchase of a house. The bank charges interest a rate of 8.9 percent per year compounded monthly. Richard has agreed to repay the loan in equal monthly installments over 35 years. a) How much should each payment...
*March 9, 2013*

**automotive repair nd maintenance**

how does the two stroke internal combustion engine work...plz explain it....
*March 7, 2013*

**math**

find the compound interest on 2650 naria in 5yrs at 7 and half % per annum.
*March 2, 2013*

**algebra**

Skip designs tracks for amusement parks. For a new design the track will be ellipitical if the ellipse is placed on a large coordinate grid with its center at (0,0) the equation x^2/2500+y^2/8100=1 model the path of the park.The units are given in yards, how long is the major ...
*March 1, 2013*

**algebra**

A conic section has the equation x^2+y^2+12x+8y=48. Determine the following; type of conic, domain and range, axes of symmetry, and center.
*March 1, 2013*

**algebra**

How far apart are the foci of an ellipse with a major axis of 26 feet and a minor axis of 24 feet?
*March 1, 2013*

**algebra**

An ellipse has foci (0,+-3) and vertices (0,+-4). What is the eccentricity of the ellipse? Please help.
*March 1, 2013*

**algebra**

Write an equation for the translation of x^2+y^2=25, by 8 units left and 4 units down. Please help.
*March 1, 2013*

**algebra**

A parabolic microphone has a cross-section in the shape of a parabola. The microphone is placed at the focus of the parabola. If the parabola is 20 inches wide and 5 inches deep, how far from the vertex should the microphone be placed? Can someone please help.
*March 1, 2013*

**algebra**

Can someone please help... a hyperbola has vertices (+-5,0) and one focus (6,0) what is the standard form equation of the hyperbola.
*February 27, 2013*

**agebra**

Can someone please help me.. find an equation that models the path of a satelite if its path is a hyperbola, a=55,000km and c=81,000km assume that the center of the hyperbola is the origin and the tranverse axis is horizontal
*February 27, 2013*

**algebra**

find an equation that models the path of a satelite if its path is a hyperbola, a=55,000km and c=81,000km assume that the center of the hyperbola is the origin and the tranverse axis is horizontal
*February 25, 2013*

**algebra**

a hyperbola has vertices (+-5,0) and one focus (6,0) what is the standard form equation of the hyperbola.
*February 25, 2013*

**algebra**

A few more question Id like for someone to check please. 1) what are the vertex, focus, and directrix of the parabola with the given equation? x^2-8x-28y-124=0 vertex (4,-5) focus (0,7) directrix y=-12 2) write an equation of a circle with given center and radius. center(-7,-6...
*February 22, 2013*

**algebra**

Can someone check my answers please and if Im wrong please explain. 1) graph 4x^2+4y^2=64. what are the domain and range? domain;all real numbers range;-4<=4<=4 2) graph 4x^2+y^2=9. what are its lines of symmetry? it has two lines of symmetry, the x axis and the y axis 3...
*February 22, 2013*

**algebra**

So x=1/12(y-4)^2+5 would be the answer?
*February 21, 2013*

**algebra**

what is an equation of a parobola with the given vertex and focus? vertex(5,4) and focus(8,4) Can someone show me the steps to get the equation please?
*February 21, 2013*

**law class**

was the sexual harassment severe in the movie "Boiler Room"?
*February 20, 2013*

**algebra**

Can someone check my answers on exploring conic sections? 1. Graph x2 + y2 = 9. What are its lines of symmetry? Every line through the center is a line of symmetry. The y-axis and the x-axis are lines of symmetry.( my choice) Every line through the center is a line of symmetry...
*February 19, 2013*

**math**

A ball dropped 16 feet. The height of each bounce of the ball is 8 feet, 4 feet, 2 feet and so on. How high will the sixth bounce be show all of your work
*February 12, 2013*

**math**

If there is a pumpkin pie eating contest, how many pumkin pies will they need if 25 people participate and they eat 7/8 of a pie show your work
*February 12, 2013*

**algebra**

Robin bought a computer for $1,250. It will depreciate, or decrease in value, by 10% each year that she owns it. a) Is the sequence formed by the value at the beginning of each year arithmetic, geometric, or neither? Explain. b) Write an explicit formula to represent the ...
*February 12, 2013*

**algebra**

the first and second is not a possible answer. 1) 1/729 1/243 1/81 1/810
*February 12, 2013*

**algebra**

I have 3 questions I need help with. 1) what is the 15th term of the sequence 81,27,9,... 2) what is a possible value for the missing term of the geometric sequence 39,_,975,_ 3) what is the sum of the finite arithmetic series (-5)+0+5+10+..+65
*February 12, 2013*

**Math**

A community center has 3 tennis teams and 5 basketball teams. No one is on both teams. How many athletes are there? Tennis---2 players Basketball---5 players Softball---10 players
*February 11, 2013*

**science**

whats the answer
*February 10, 2013*

**Chemistry**

Thanks!
*February 8, 2013*

**Chemistry **

When a fuel that contains sulfur is burned,the sulfur is converted to SO2. Suppose all of this SO2 is then oxidized in the atmosphere to SO3. The SO3 dissolves in atmospheric moisture to form sulfuric acid (H2SO4) contributing to acid rain. A particular fuel contains 1% sulfur...
*February 8, 2013*

**Chemistry**

Thanks!
*February 8, 2013*

**Chemistry**

How do you balance the equation when you have calcium nitrate and phosphoric acid?
*February 8, 2013*

**Chemistry**

How many grams of Ca3(PO4)2 can be formed from 206 g of calcium nitrate and 140 g of phosphoric acid?
*February 8, 2013*

**Chemistry**

Thanks!
*February 8, 2013*

**Chemistry**

If 16.9 g of CO2 was produced from the thermal decomposition of 41.83 g of CaCO3, what is the percentage yield of the reaction? CaCO3(s) > CaO(s) + CO2(g)
*February 8, 2013*

**math**

Thank you ms. Sue
*February 7, 2013*

**math**

Ms.Sue I got 49 pages
*February 7, 2013*

**math**

Gina read 35% of her 140 page book how many pages did she read?? Show all your work
*February 7, 2013*

**math**

A skateboard is on sale for 85% of the regular price if it is regularly priced at $40, how much is the sale price show all of your work below
*February 7, 2013*

**algebra**

Need help with this one write an explicit formula for the sequence 1/2,3//7,1/3,5/19,3/14 then find q14 I dont know how to set this up can someone please show me how this one works
*February 5, 2013*

**algebra**

got it thanks
*February 5, 2013*

**algebra**

Write a recursive formula for the sequence formula 15,26,48,92,180,.. then find the next term. can someone please help me
*February 5, 2013*

**algebra**

I think i figured it out 1,13,25,37,49
*February 5, 2013*

**algebra**

Generate the first five terms in the sequence using the explicit formula; Cn=12n-11 Please explain
*February 5, 2013*

**algebra**

Could someone check my work; 1. Generate the first five terms in the sequence using the explicit formula. yn = –5n – 5 –30, –25, –20, –15, –10 30, 25, 20, 15, 10 –10, –15, –20, –25, –30(my answer) 10, 15, 20, 25, 30 2...
*February 3, 2013*

**chemistry**

dont understand
*January 31, 2013*

**chemistry**

A gas has a volume of 590mL at a temperature of -55.0C What volume will the gas occupy at 30.0C Can someone help me?
*January 31, 2013*

**algebra**

compare the graphs of the inverse variations by comparing asymptotes, similar points, lines of reflections and quadrants y=-0.7/x and y=-0.9/x
*January 30, 2013*

**algebra**

what is the quotient in simpliest form state the restrictions on the variable z^2-4/z-3 divided z+2/z^2+z-12 i got z^2+2x-8 but am not sure of the restrictions maybe 3,-2
*January 30, 2013*

**algebra**

What is the product in simpliest form state any restrictions on the variable x^2+7x+10 / x+3 times x^2-3x-18 / x^2+x+2 I got (x+5)(x-6) / x-1, not sure on restrictions either 1 or -3,-2, and 1
*January 30, 2013*

**algebra**

Simplify the rational expression state any restrictions on the variable t^2+2t-24 / t^2-36 I got t-4 / t-6, but Im not sure of the restrictions whether its 6 or -6,6
*January 30, 2013*

**algebra**

Find the horizontal asymptote of the graph of y=-4x^6+6x+3 / 8x^6+9x+3 please explain i think there is no horizontal asymptote
*January 30, 2013*

**algebra**

please explain the step for this I have no idea. the speed of the current in a river is 6 mph a ferry operator who works that part of the river is looking to buy a new boat for his business everyday his route takes him 22.5 miles against the current and back to his deck and he...
*January 29, 2013*

**algebra**

Thanks for checking my work
*January 29, 2013*

**algebra**

please explain the step for this I have no idea. the speed of the current in a river is 6 mph a ferry operator who works that part of the river is looking to buy a new boat for his business everyday his route takes him 22.5 miles against the current and back to his deck and he...
*January 29, 2013*

**physics**

An athlete executing a long jump leaves the ground at a 32.3 angle and travels 7.84 m. What was the takeoff speed? If this speed were increased by just 5.0%, how much longer would the jump be?
*January 28, 2013*

**algebra**

siplify and state any restrictions on the variables. x-2/x+3 plus 10x/x^2-9 Hope someone can explain this to me.
*January 24, 2013*

**algabre**

the speed of the current in a river is 6 mph a ferry operator who works that part of the river is looking to buy a new boat for his business everyday his route takes him 22.5 miles against the current and back to his deck and he needs this trip in a total of 9 hours he has a ...
*January 24, 2013*

**Accounting**

Can someone show me this bank reconciliation? On Aug 14th, One of our Partner's ( Compuville ) cash book showed a debit balance of $4,000.00. His bank statement showed a balance of $4,270.00. On comparison the following were found: * check issued amounting to $2,500.00 has...
*January 19, 2013*

**algebra**

how do the graphs of y=1/x and y=3/x-4 compare? a) compared to the graph of f=1/x the grapg of y=3/x-4 is vertical stretch by factor of 3 and a translation of 4 units left b) compared to the graph of y=1/x the graph of 3/x-4 is a vertical shrink by a factor of 3 and ...
*January 19, 2013*

**physical sciences (motion in two dimensions) **

John stand at the top of a 30m building. He throws a stone upwards with a speed of 5m/s. Calculate. (1)how long the stone is in the air. (2)the maxi mum height the stone reaches the ground?
*January 17, 2013*

**Trigonometry**

The populations, P, of six towns with time t in years are given by: I) P=1000(1.08)^t II) P= 600(1.12)^t III) P = 2500(0.9)^t IV) P=1200(1.185)^t V) P=800(0.78)^t VI) P=2000(0.99)^t a. Which towns are growing in size? Which are shrinking? b. Which town is growing the fastest? ...
*January 15, 2013*

**algebra**

Archers need to use arrows that do not bend easily. The table shows how the weight of an arrow affects its spine or the distance the center of the arrow bends when a certain constant weight is attached. Graph the data in the table to find a linear and quadratic model for the ...
*January 8, 2013*

**algebra**

Steve can you recheck my answer
*January 4, 2013*

**algebra**

this is what i got y=39 x=-117 y when x=-132 39/-117=k k=-0.3 y=-0.3*-132 y=39.6
*January 4, 2013*

**algebra**

so should be 39.6
*January 4, 2013*

**algebra**

oh ok thanks for catching my mistake
*January 4, 2013*

**algebra**

Find the value of y for a given value of x, if x varies directly with x. If y=39 when x=-117 what is y when x=-132 my answer y=k*x 39=k*-117 39/-117=k k=-0.3 y=k*x y=-0.3*-1.32 y=-3.96 can someone please check my work
*January 4, 2013*

**algebra**

not sure they are in possible answers
*January 4, 2013*

**algebra**

what is the simpler form of the radical expressio. 4 sqrt 2401x^12y^16 I know its 7x^3y^4 but not sure if looks like 7[x^3[y^4 7x^3[y^4
*January 4, 2013*

**algebra**

would the answer be 2 3sqrt 6 + 9 3sqrt18 over 6
*January 4, 2013*

**algebra**

how can you write the expression with rationalized denominator? 2+3sqrt3/3sqrt6
*January 4, 2013*

**algebra**

i dont understand
*January 4, 2013*

**algebra**

Wind farms are a source of renewable energy found around the world. The power P(in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v(in meters per second) If a turbine generates 700kW in a 5m.s wind, how much power does it generate in a 14m...
*January 4, 2013*

**algebra**

Can someone please explain this problem
*January 4, 2013*

**algebra**

The table shows the amount of milk that wisconsin dairy farms produced from 1939 to 1962 which linear model best fits this data? year milk produced(in billions of lbs 1939 12 1962 15 2005 21
*January 4, 2013*

**algebra**

thank you
*January 4, 2013*

**algebra**

Find the real solutions of the equation. -8x^3-17x^2+7x=0
*January 4, 2013*

**algebra**

thank you, helped explaining the answer
*January 4, 2013*