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March 29, 2015

March 29, 2015

Total # Posts: 1,435

**Math**

Please explain in detail how to solve this: During one year, about 163 million adults over 18 years old in the U. S. spent a total of about 93 billion hours online at home. On average, how many hours per day did each adult spend online at home? How do you write each number in ...
*January 5, 2012*

**math**

Please explain in detail how to solve each question: At a certain high school, 350 students are taking an algebra course. The ratio of boys to girls taking algebra is 33:37. How many more girls are taking algebra than boys? How can you write a system of equations to model the ...
*January 4, 2012*

**math**

An artist is going to sell two sizes of prints at an art fair. The artist will charge $20 for the small print and $45 for a large print. The artist would like to sell twice as many small prints as large prints. The booth the artist is renting for the day cost $510. How many of...
*January 4, 2012*

**math**

During one year, about 13 million adults over 18 years old in the U.S. spent a total of about 93 billion hours online at home. On average how many hours per day did each adult spend on line at home? How do you write each number in scientific notation? How do you convert the ...
*January 4, 2012*

**Math**

During one year, people in the U.S. older than 18 years old watched a total of 342 billion hours of television. The population of the U.S. older than 18 years old was about 209 million people. On average, how many hours of television did each person older than 18 years old ...
*January 4, 2012*

**Math**

During one year, about 13 million adults over 18 years old in the U.S. spent a total of about 93 billion hours online at home. On average how many hours per day did each adult spend on line at home? How do you write each number in scientific notation? How do you convert the ...
*January 4, 2012*

**math**

You have $47 to spend on music and movie downloads. Each album download costs $7 and each movie download costs $8. Write and graph a linear inequality that represents this situation. Let x represent the number of albums and y the number of movies.
*December 31, 2011*

**math**

Please explain how to solve: Reid and Maria both play soccer. This season, Reid scored 4 less than twice the number of goals that Maria scored. The difference in the number of goals they scored was 6. How many goals did each of them score?
*December 31, 2011*

**math**

I believe the answer is 5 months; however, I did it the long way. Explain how to find the answer. Tom has a collection of 30 CDs and Nita has a collection of 15 CDs. Tom is adding 1 CD a month to his collection while Nita is adding 4 CDs a month to her collection. Find the ...
*December 31, 2011*

**math**

The vertices of quadrilateral ABCD are (A(1,1), B(1,5), C(5,5) and D(7,1). You want to transform ABCD into a parallelogram by only moving point B. A parallelogram is a four-sided figure with both pairs of opposite sides parallel. What should be the new x-coordinate of point B?
*December 30, 2011*

**math**

Explain how to solve: Sam is ordering pizza. Tony's Pizza charges $7 for a large cheese pizza plus $.75 for each additional topping. Maria's Pizza charges $8 for a large cheese pizza plus $.50 for each additional topping. For what number of toppings will the cost of a ...
*December 30, 2011*

**math**

Explain how to solve: A chemist has one solution containing 30% insecticide and another solution containing 50% insecticide. How much of each solution should the chemist mix to get 200 L of a 42% insecticide?
*December 30, 2011*

**math**

A farmer grows only pumpkins and corn on her 420-acre farm. This year she wants to plant 250 more acres of corn than pumpkins. How many acres of each crop should the farmer plant?
*December 30, 2011*

**math**

Please show me how to solve: The length of a rectangle is 3 times the width. The perimeter is 44 cm. What are the dimensions of the rectangle?
*December 30, 2011*

**math**

A corner store sells two kinds of baked goods: cakes and pies. A cake costs $14 and a pie costs $8. In one day, the store sold 12 baked goods for a total of $144. How many cakes did they sell?
*December 29, 2011*

**math**

You have $47 to spend on music and movie downloads. Each album download costs $7 and each movie download costs $8. Write and graph a linear inequality that represents this situation. Let x represent the number of albums and y the number of movies.
*December 29, 2011*

**math**

How many solutions does the system have? y - 5x = -6 3y - 15x = -12 A) infinitely many solutions B) no solution C) two solutions D) one solution
*December 29, 2011*

**math**

Please show me how to solve: Sharon has some one-dollar bills and some five-dollar bills. She has 14 bills. The value of the bills is $30. Solve a system of equations using elimination to find how many of each kind of bill she has.
*December 29, 2011*

**math**

Please show me how to solve: At the local ballpark, the team charges $5 for each ticket and expects to make $1,300 in concessions. The team must pay its players $1,800 and pay all other workers $1,500. Each fan gets a free bat that costs the team $3 per bat. How many tickets ...
*December 29, 2011*

**math**

A local citizen wants to fence a rectangular community garden. The length of the garden should be at least 110 ft, and the distance around should be no more than 380 ft. Write a system of inequalities that models the possible dimensions of the garden. Graph the system to show ...
*December 29, 2011*

**Math**

Please explain in detail how to solve the following problem using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 6h 20 min to make 4 small centerpieces and 7 large center pieces. How long does it take to make each ...
*December 29, 2011*

**math**

Please show me how to solve using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 5 h 20 min to make 4 small center pieces and 7 large centerpieces. How long does it take to make each small centerpiece and each large ...
*December 28, 2011*

**Math**

Please explain how to solve this equation with substitution: The owner of a hair salon charges $20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from haircuts were $750. How much does the owner ...
*December 28, 2011*

**Math**

Please explain to me how to solve this problem: Reid and Maria both play soccer. This season, Reid scored 4 less than twice the number of goals that Maria scored. The difference in the number of goals they scored was 6. How many goals did each of them score?
*December 26, 2011*

**Math**

Please show me how to solve the following problem: The ocncession stand is selling hot dogs and hamburger during the game. At half-time,they sold a total of 78 hamburgers and hot dogs and brought in $105.50. How many of each item did they sell if hamburgers sold at $1.50 and ...
*December 26, 2011*

**math**

Please show me how to calculate this problem: The school cafeteria sells two kinds of wraps: vegetarian and chicken. The vegetarian wrap costs $1.00 and the chicken wrap costs $3.20. Today they made $99.20 from the 42 wraps sold. How many of the wraps sold were vegetarian?
*December 23, 2011*

**Physics**

A cardboard carton weighing 165 newtons is resting on a marble floor. If the coefficient of friction between cardboard and smooth marble is 0.20, how much force would it take to keep the box sliding along at a constant speed?
*December 19, 2011*

**english**

What?
*December 15, 2011*

**English**

Just use the website that you got the information from, not the original website.
*December 15, 2011*

**Math**

2cosx + sqr3 = x [0degrees,360degrees)
*December 14, 2011*

**math**

Aimi is making Valentine's Day cards for everyone in her class. She plans to use a whole sheet of paper for each of her 5 closest friends. She will use 1/2 of a sheet of paper for everyone else in the class. She has 15 sheets of paper. How many cards can she make? The ...
*December 13, 2011*

**math**

Aimi is making Valentine's Day cards for everyone in her class. She plans to use a whole sheet of paper for each of her 5 closest friends. She will use 1/2 of a sheet of paper for everyone else in the class. She has 15 sheets of paper. How many cards can she make?
*December 13, 2011*

**Algebra**

The profit, y, be selling x pretzels is found by the formula y = -0.002x^2 + 1.6x -350. Find the number of pretzels that must be sold to maximize profit.
*December 12, 2011*

**calculus**

Let f be the function given by f(x)= x^2+4x-8. The tangent line to the graph at x=2 is used to approximate values of f. For what value(s) of x is the tangent line approximation twice that of f?
*December 11, 2011*

**calculus**

Thanks, that's the answer I get.
*December 9, 2011*

**calculus**

The width of a rectangle is measured as 12.3 cm, while the length is measured as 28.8 cm. The width measurement could be off by 1.2 cm, and the length could be off by .04 cm. Estimate the maximum possible error in calculating the area of the rectangle.
*December 9, 2011*

**calculus**

thanks!
*December 8, 2011*

**calculus**

Find the volume that remains after a hole of radius 1 is bored through the center of a solid sphere of radius 2.
*December 8, 2011*

**calculus**

thanks, that's pretty close to what I got
*December 8, 2011*

**calculus**

W=6x^4 * SQRT4y * ln * (3z) Yes, the derivative of W with respect to x
*December 8, 2011*

**calculus**

W=6x^4 SQRT4y ln (3z) find F with regards to x Is 24x^3 SQRT4y ln (3z) correct?
*December 8, 2011*

**health and safety**

1 tablespoon p.58
*December 6, 2011*

**Calculus**

Find the partial derivative for x. f(x,y)=1/SQRTx^2+y^2
*December 1, 2011*

**physics**

Running at 2.0 m/s a 45.0 kg person collides with a 90.0 kg person who is traveling at 7.0 m/s in the other direction. Upon collision, the 90 kg person continues to travel forward at 1.0 m/s. How fast is the 45 kg person knocked backwards?
*November 29, 2011*

**Calculus**

same thing I got, but not even close to any of the answer choices ... 2.69, 16.69, -2.15, and 1.51. This one has me stumped!!
*November 27, 2011*

**Calculus**

Use integration by parts to find the integral. Round the answer to two decimal places if necessary. (x+4) ln x dx between 3 and 0. I tried this problem two different ways and got two different answers 1.63 and 3.89. which one is correct? Please.
*November 27, 2011*

**chemistry**

Calculate the molarity of a 295 mL solution contain 45 g of ethanol (C2H5OH)
*November 27, 2011*

**Calculus**

so my answer would be 3/2 (3e^4+1)/ (e^2-1)?
*November 26, 2011*

**Calculus**

(1/e^2-1)(6x^2 lnx/2-x^2/4) am I on the right track?
*November 26, 2011*

**Calculus**

Find the average value of the function on the given interval. f(x)=6x lnx; [1,e^2]
*November 26, 2011*

**Calculus**

thanks for your answer, there was typo on the question ... but I figured out the answer using excel spreadsheet for Simpson's rule.
*November 25, 2011*

**Calculus**

Use your calculator to approximate the integral using the method indicated, with n=100. Round your answer to four decimal places. sqrt(x+4)^dx between 4 and 0.
*November 25, 2011*

**Chemistry**

Write the molecular equation, the complete ionic equation, and the net ionic equation for the reaction of barium hydroxide with sodium nitrate.
*November 23, 2011*

**Chemistry**

How many milliliters of a 3.85 M solution of Fe2+ are needed to titrate 250.0 mL of a 0.125 M Cro4 2- solution? H + CrO4 2- + Fe2+ yields to Fe3+ + Cr2O3 + H2) (not balanced)
*November 23, 2011*

**Chemistry**

What is the mass, in grams, of NaCl formed from the reaction of 2.75 mL of a 6.00 M Na2SO4 solution and 8.30 mL of 2.5 M solution of HCl?
*November 23, 2011*

**Calculus**

that's what I was thinking, the teacher must have made a mistake on this question ... no one I ask can help me with it.
*November 23, 2011*

**Calculus**

Use integration by parts to find the integral. Round the answer to two decimal places if necessary. (x+4)^ln x dx between 3 and 0
*November 23, 2011*

**Math**

Please show me how to solve: Hannah took a survey of 500 students at her school to find out whether they liked baseball or football. The results are shown in the Venn diagram. How many of the students surveyed like football? 28% liked baseball, 32% liked both, 16% liked ...
*November 21, 2011*

**science-important!**

What was the correct answer?
*November 19, 2011*

**math**

Steve, Is there a way to find out how many liked football only. How do you separate the "both" number to find football only?
*November 19, 2011*

**math**

How many of the students surveyed liked football?
*November 19, 2011*

**math**

Please show me how to solve: Hannah took a survey of 500 students at her school to find out whether they liked baseball or football. The results are shown in the Venn diagram. How many of the students surveyed like football? 28% liked baseball, 32% liked both, 16% liked ...
*November 19, 2011*

**math**

Please show me how to work this problem: Fran makes a rectangular tablecloth that has an area of 5 ft squared. Her mother makes a tablecloth that is three times the length and three times the width of Fran's. What is the area, in square feet, of her mother's tablecloth?
*November 19, 2011*

**Math**

Two farmers use combines to harvest corn from their fields. One farmer has 600 acres of corn, and the other has 1000 acres of corn. Each former's combine can harvest 100 acres per day. Write two equations for the number of acres y of corn not harvested after x days. Are ...
*November 19, 2011*

**math**

Please show me how to solve: For what value of k are the graphs of 12y = -3x + 8 and 6y =kx - 5 parallel? For what value of k are they perpendicular?
*November 17, 2011*

**algebra**

I do not know how to do this problem, please help. (35b^3 + 25b^2 + 30b + 44)divided by (5b + 5)
*November 14, 2011*

**algebra**

Please I do not know how to figure this out: Identify the degree of each term of the polynormial and the degree of the polynormial of -4x^3 + 2x^2 + 7x + 1 degree of the first term, second, third, fourth terms and the polynomial
*November 13, 2011*

**algebra**

Again I have no clue in figuring out this problem, please help: (3s^4-3s^3+3s^2+13s-6) + (s^5+8s^3+6s^2-3s+3) + (-6s^4+s^2-7s-6)=
*November 13, 2011*

**algebra**

Again I have no clue in figuring out this problem, please help: (3s^4-3s^3+3s^2+13s-6) + (s^5+8s^3+6s^2-3s+3) + (-6s^4+s^2-7s-6)=
*November 12, 2011*

**algebra**

Please I do not know how to figure this out: Identify the degree of each term of the polynormial and the degree of the polynormial of -4x^3 + 2x^2 + 7x + 1 degree of the first term, second, third, fourth terms and the polynomial
*November 12, 2011*

**algebra**

Please help: Multiply and simplify: (5sqrt:5 - 10sqrt:3)(2sqrt:5 + 4sqrt:3)
*November 12, 2011*

**algebra**

Help: Divide: (35b^3+ 25b^2 + 30b +44) divided by (5b + 5)
*November 12, 2011*

**algebra**

Please I need help: Find the vertex, the line of symmerty and the maximum or minmum value of the quadratic function: f(x)= 2x^2+2x+3
*November 11, 2011*

**math**

What is the slope of a line that is parallel to y=2? What is the slope of a line that is perpendicular to y=2? Is it "0"?
*November 11, 2011*

**math**

Write an equation that has a slope of -2/3 in Point-slope form and Slope-intercept form.
*November 10, 2011*

**algebra**

Please help: If the sides of a square are lingthened by 7cm, the area becomes 169cm^2. Fine thelength of a side of the orginal square.
*November 10, 2011*

**algebra**

Need help. please help: Solve and simplify, use comma to separate answers: sqrt:9x+55=x+5
*November 10, 2011*

**algebra**

Add and simplify 4y/y^2-9 + y/y-3
*November 10, 2011*

**algebra**

I do npot understand how to do this problem, please help: 4y/y^2-y/y-3
*November 10, 2011*

**algebra**

Please I need help! Solve and simplify: x^2+14x-4=0
*November 10, 2011*

**Math**

Describe how to draw a line that passes through the origin and has a slope of 3/5.
*November 9, 2011*

**college math excursions**

what is the next number sequence for 0,10,24,56,112,190
*November 8, 2011*

**physics**

6600 N
*November 7, 2011*

**english**

Can somebody help me restate my thesis please. statement for the conclusion. My thesis is: An analysis of the literary devices in Katy Perry " Fireworks" and Miley Cyrus " The Climb" reveals Miley Cyrus creates a better argument for how every person is an ...
*November 3, 2011*

**math**

F(x) = /x-2/ (absolute value) Please show me to to graph this equation.
*November 1, 2011*

**math**

for F(x) = /x-2/ (absolute value) When you graph this problem, does it have a straight line or a "v" line?
*November 1, 2011*

**chemistry**

Hi everyone, Why are metals more reactive in acids? Thanks
*October 29, 2011*

**natural disaster**

if volcanos and earthquakes, why do people choose to live in the area where it occurs the most?
*October 28, 2011*

**data management**

1) show that a) 2(2n-1 C n-1) = (2n Cn) b) n(2n C n) = (n+1)(2n C n+1)
*October 28, 2011*

**english**

is " but I will not allow anyone to succeed hanging clouds over me" a metaphor or paradox or is it something else? is "there's a light in me, that shines brightly" a metaphor? " Iwill rise steadily sailing out of their reach" a paradox? if im ...
*October 28, 2011*

**english**

can somebody tell where the poetic devices are located in the song cant take that away by mariah carey? such as metaphor, mood paradox etc. Mmmmh Whoaaa They can say, Anything they want to say, Try to bring me down, But I will not allow anyone to succeed hanging clouds over me...
*October 28, 2011*

**data management**

1) solve: a) (2n+1C2) = (nC2)sqaured b) 12(nC2) = n!
*October 28, 2011*

**Data management**

1)SOLVE: a) 2nP3 = 2(nP4) b)6(n+1P2) = 3nP2 2) If (nC12 = (nC8), find (nC17) and (22Cn) 3)simplify. a) n(squared) (n-2)! - n(n-2)! / n! b) (nC2) - (nCn-2) 4)If nPr - 506 and (nCr_ = 253, find n and r. 5) If (28C2r)/(24C2r-4) = 225/11, find r.
*October 27, 2011*

**College Math**

Make 300 mL of a 0.4M NaOH solution.
*October 27, 2011*

**College Chemisrty**

There are 140 g of H2SO4 in 400 mL of a solution. What is the molarity?
*October 27, 2011*

**Data management**

1) consider the number of grid paths from the orgin in a coordinate graph to each of the following points: a) (4,7) b) (3,7) c) (4,6) 2) simplify: (n-r)! / (n-r+1)! 3) solve (n+2)!/ (n-1)! = 210
*October 27, 2011*

**math**

Suppose your business has a special checking account used just for paying the phone bill. The balance is $1040.00 this month. Next month the balance will be $995.80, after that it will be $951.60, and on the third month the balance will be $907.40. Write a rule to represent ...
*October 27, 2011*

**math**

a function is (always, never or sometimes) a relation.
*October 27, 2011*

**Data management**

1) In how many ways can 12 distinct objects be seperated into three equal piles? 2) In how many ways can 25 students be assigned to 4 distinguishable study groups if at least 6 students must be in each group? 3) in how many ways can 4 students be assigned to 9 class periods if...
*October 27, 2011*

**Math**

Lloyd makes an hourly wage of $9.50 per hour. Every 6 months he receives a $0.50 per hour raise. Write a rule that describes his raise and determine how much he will be paid after 4 years.
*October 27, 2011*

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