Wednesday

February 10, 2016
Total # Posts: 1,518

**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*

**fraction 10-1 math**

the anwser is 3/7 because 4+3=7.
*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*

**math**

You budget $100 each month for parking. Each day you use the downtown parking lot. It costs $5. Write a rule to represent the amount of money left in the monthly budget as a arithmetic sequence. How much money is left in you budget after you have used the downtown parking lot ...
*October 25, 2011*

**math**

You start an investment account with $3000 and save $100 each month. Write a rule to represent the total amount of money you invest in the account as an arithmetic sequence. How much money will you have invested after 12 months?
*October 25, 2011*

**arithmetic**

The initial term of an arithmetic sequence is 5. The eleventh term is 125. what is the common difference of the arithmetic sequence?
*October 25, 2011*

**Statistics**

1. Consider a population with µ=73.6 and 0 = 5.38 (A) Calculate the z-score for x =72.7 from a sample of size 45. (B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B of the text? Why or why not?
*October 25, 2011*

**math**

you want to take an 8-ft.wide piece of plywood through a 36-inch-wide door. What is the minimum possible height for the door to allow youto fit the plywood?
*October 24, 2011*

**math**

two cars leave the same point at noon. one car travels north and the other car travels east. suppose the northbound car is traveling 40mph, and after two hours, the two car are 100 miles apart.how fast is the other car going?
*October 24, 2011*

**math**

two cars leave the same point at noon. one car travels north and the other car travels east. suppose the northbound car is traveling 40mph, and after two hours, the two car are 100 miles apart.how fast is the other car going?
*October 24, 2011*

**Statistics**

Consider a population with µ=73.6 and 0 = 5.38 (A) Calculate the z-score for x =72.7 from a sample of size 45. (B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B of the text? Why or why not?
*October 24, 2011*

**math**

hello ya im helping my son homework.regarding estimation to get reasonable range. Three classes collected aluminum cans for recycling .one class collected 42 cans,another collected 56 cans,and the third class collected 64 cans .what is a reasonable range of the number of cans ...
*October 23, 2011*

**math**

hello ya im helping my son homework.regarding estimation to get reasonable range. Three classes collected aluminum cans for recycling .one class collected 42 cans,another collected 56 cans,and the third class collected 64 cans .what is a reasonable range of the number of cans ...
*October 23, 2011*

**Statistics**

Find the normal approximation for the binomial probability that x = 5, where n = 12 and p = 0.7. Compare this probability to the value of P(x=5) found in Table 2 of Appendix B in your textbook.
*October 20, 2011*

**HUM/111**

identify two possible strategies that Thomas Hutchinson or Samuel Adams, or both, likely used to develop and improve his thinking prior to taking a stand and acting according to his beliefs.
*October 14, 2011*

**Physics**

I have the same problem and that previous answer is wrong.
*October 12, 2011*

**Ap Chem**

thanks and i understand. i appreciate your write up!
*October 9, 2011*

**Ap Chem**

Consider the following reaction at 1000°C:CO(g) + 3H2(g) CH4(g)+ H2O(g) At equilibrium, the following concentrations are measured: [CO] = 0.0613 M, [H2] = 0.1839 M, [CH4] = 0.0387, [H2O] = 0.0387 M. Calculate the value of Kc for this reaction. Calculate the value of Kp. ...
*October 9, 2011*

**Ap Chem**

Why is it possible for Kp to be less than Kc? If this is the case then when Kc>1 it favors products, but if Kp <1 than how can that reaction favor products? Or does that rule only apply for Kc
*October 9, 2011*

**Ap Chem**

Why is it possible for Kp to be less than Kc? If this is the case then when Kc>1 it favors products, but if Kp <1 than how can that reaction favor products? Or does that rule only apply for Kc
*October 9, 2011*

**math**

3/4-1/3z=1/4 5/6c-2/3c=1/3 please show step by step Thanks!
*October 2, 2011*

**math**

3/4 - 1/3z= 1/4 please show step by step to ans.
*October 2, 2011*

**algebra**

2(a-4)+15=13 Please show step by step
*October 2, 2011*