Friday

July 29, 2016
Total # Posts: 1,284

**Maths - Year 10 - Simult. Equations**

50x + 20y = 310 x + y = 11 multiply bottom equation by 20 50x + 20y = 310 20x + 20y = 220 substitute into 1st equation via elimination 30x = 90 x = 90 ÷ 30 x = 3 solve for y 3 + y = 11 y = 11 - 3 y = 8 Answer: 3 50c pieces and 8 20c pieces
*June 3, 2016*

**Pre-Calculus**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x - y + 3z = 12 x + 4y + 6z = -32 5x + 3y + 9z = 20 Please help me..
*June 2, 2016*

**Pre-Calculus**

That is exactly what I had for my answer but I was confused that I had an answer of 2 solutions.
*June 2, 2016*

**Pre-Calculus**

Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0 I solved the problem but I got it wrong for some reason..can you solve it step by step?
*June 2, 2016*

**Pre-Calculus**

Locate the foci of the ellipse. Show your work. x^2/36+y^2/11=1 c^2=a^2-b^2 c^2=36-11 c^2=25 c= ± sqrt25 c= ±sqrt5*5 is this correct?
*June 2, 2016*

**Pre-Calculus**

Find the vertical asymptotes, if any, of the graph of the rational function. Show your work. f(x) = (x-4)/(x(x-4)) (x-4)/x(x-4) the common factors cancel out and all is left is f(x)= 1/x... how do I solve this problem?
*June 1, 2016*

**History**

I think its b or c
*May 28, 2016*

**History**

Which factor contributed most to Florida becoming a U.S. territory? a. the outcome of the Seminole Wars b. the weakening of Spain's hold over its colonial possessions c. the desire of Southern politicians to expand slavery into new territories d. the development of the ...
*May 28, 2016*

**Pre-Calc**

Find the vertical asymptotes, if any, of the graph of the rational function. Show your work. f(x) = (x-4)/(x(x-4)) How would I show my work? the x-4 cancel out and I am left with 1/x. The vertical asymp. is x= 0
*May 24, 2016*

**Pre-Calc**

For the data set shown by the table, a. Create a scatter plot for the data. (You do not need to submit the scatter plot) b. Use the scatter plot to determine whether an exponential function or a logarithmic function is the best choice for modeling the data. Number of Homes ...
*May 24, 2016*

**Pre-Calc**

thank you!
*May 24, 2016*

**Pre-Calc**

Verify the identity. Show your work. cot2x + csc2x = 2csc2x - 1 1+cosec^2x +cosec^2x Cot^2x+cosec^x= 1+2 cosec^2x Would this be correct?
*May 24, 2016*

**Math**

Solve the equation on the interval [0, 2π). tan2x sin x = tan2x would it be 0, pi/2 ?
*May 23, 2016*

**Math**

Solve the equation on the interval [0, 2π). cos x + 2 cos x sin x = 0 would the answer be 7pi/6 , 11pi/6 ?
*May 23, 2016*

**Math**

The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by pH = -logx where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the ...
*May 23, 2016*

**Math**

yup!
*May 18, 2016*

**Math**

In the formula d=rt d represents distance in miles, r represents average speed in miles per hour, and t represents time in hours.What is an automobiles average speed if it travels 60 in 1 1/2 hours?
*April 27, 2016*

**maths**

ken has 4 times as much money as Jake. if Jake gave Ken £360 he would still have more money than Ken. whats the least money Ken will have?
*April 14, 2016*

**Math**

A car dealer makes a 12% commission on every car sold. If the dealer sells a car for $10,000, how much does he make in commission?
*April 13, 2016*

**Math**

If 100 students are surveyed, about how many students own 2 or more pets? Explain please 0 pets __________ 1/20 1 pet __________ 1/2 2 0r more _______ 9/20 Thank you very much
*March 23, 2016*

**Biology**

How do I set up a trihybrid punnett square if the cross is TTRRPp x TtRrPp?
*March 12, 2016*

**History Help???**

I believe the answer is D
*March 9, 2016*

**cHEMISTRY**

What mass of AgCl(143.32g/mol) is formed from the reaction of a 0.109 M MgCl2 solution with excess AgC2H3O2?
*February 29, 2016*

**Math**

The total income amount is about 983 because 59 is 6% of 983.
*February 28, 2016*

**Geometry**

How would one solve similar right triangles if the first triangle has y and x as legs and a (altitude) as hypotenuse, and the second triangle has one leg of 50, the other is a, and the hypotenuse is 100. I solved for a, and it came out to be 86.6? Is this correct? How do I ...
*February 8, 2016*

**Algebra**

The sum of measures of angle X and angle Y is 90. If the measure of angle X is 30 less than twice the measure of angle Y, what is the measure of angle X?
*January 20, 2016*

**Math**

got it thank you
*November 28, 2015*

**Math**

inverse laplace transform of {5/(s-4)^3}
*November 28, 2015*

**spanish**

Alyssa, did you ever figure it out? I don't see it in the lesson.
*November 14, 2015*

**business calc.**

The management of Ditton Industries has determined that the daily marginal revenue function associated with selling x units of their deluxe toaster ovens is given by the following where R '(x) is measured in dollars/unit. Rtext( )'\(x\) = -0.1x + 40 (a) Find the daily ...
*November 13, 2015*

**health information law and ethics**

Advance directives are defined by your readings as written instructions recognized under state law, such as living wills or durable powers of attorney for health care, that relate to the kind of health care the patient wishes to have or not have when incapacitated. Also know ...
*November 6, 2015*

**Math**

Lindsay has 10 inches of ribbon. She buys another three lengths of ribbon, each 5 inches long. How much ribbon does she have now?
*November 3, 2015*

**Chemistry**

wow, okay. Thank you!
*November 2, 2015*

**Chemistry**

Determine the number of grams of water in 7.00 g of copper(II) sulfate pentahydrate.
*November 2, 2015*

**Chemistry **

An experiment requires 0.34 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.34 M base?
*November 1, 2015*

**Math**

Working together two people can cut a lawn of grass in 5 hours. One person can do the job alone in 1 hour less than the other. How long would it take the faster person to do the job?
*October 8, 2015*

**AP Statisics **

Joe scores 1770 on the SAT. Assuming that both tests measure the same thing, what score on the ACT is equivalent to Jose's SAT score? Explain.
*October 2, 2015*

**chemistry**

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 14.4 g of carbon were burned in the presence of 55.2 g of oxygen, 16.8 g of oxygen remained unreacted. What mass of carbon dioxide was produced?
*September 27, 2015*

**Math**

193.75 miles
*September 23, 2015*

**public speaking**

when deciding on the topic, it is important to consider
*September 16, 2015*

**Math**

Describe a real-world problem that can be solved using the expression 29 divided by (3/8 + 5/6). Find the answer in the context of the situation. I know the answer is 24, however I cannot think of an expression to go along with this.
*September 10, 2015*

**Math**

Amy is building a house. The basement floor is at -15 feet. The roof of the house is above the ground 25 feet. Express the comparison of heights as an inequality. Explain the meaning of the inequality.
*September 2, 2015*

**Math**

Amy is building a house. The basement floor is at -15 feet. The roof of the house is above the ground 25 feet. Express the comparison of heights as an inequality. Explain the meaning of the inequality.
*September 2, 2015*

**Physics**

What will be the unit?
*August 29, 2015*

**Physics **

A force of 64 N is applied on a body producing an acceleration of 2.4 m/s^2. What is the mass of a body?
*August 29, 2015*

**Math**

Decompose 28*6 to make it easier below. Paula had a block of cream cheese that was 2 inches wide, 5 1/2 long and 1 1/2 inches tall. Paula used 1/2 of the cream cheese in her recipe. How many cubic inches of cream cheese did she use?
*August 23, 2015*

**math**

Which symbol is used to make -6? |-8| a true statement? A. > B. < C. = Is the answer B? Thank you
*August 21, 2015*

**Math**

Oops sorry thank you.😊
*August 21, 2015*

**Math**

Which set of integers are in the right order from least to greatest? A. -8,8,6,|-7|,5 B. |-7|,-8,8,6,5 C. -8,5,6,|-7|,8 D. 5,6,8,-8,|-7| Is the answer b? Thank you
*August 21, 2015*

**Chemistry**

Calculate the pH of a potassium phosphate buffer if the pKa of KH2PO4 is 7.2 and the acid-base ratio is 2:1 I took Chemistry 7 years ago and am in a review for a Biochem course I am takin. I do not remember the basics so any help with how to get started or what equations to ...
*August 18, 2015*

**P.E**

1. John goes running around his neighborhood everyday after work. What health-related factors will he be improving through his type of training? A. Cardiovascular efficiency and muscular strength. B/ power and speed. C. Agility and speed. D. Cardiovascular efficiency and speed...
*August 18, 2015*

**P.E**

1. What are the two important parts of physical fitness program? A. Skill-related and health-related B. Physical-related and mental-related C. Heart-related and skeletal related D. Cardio-related and strength related. 2. Body composition is best defined as: A. How much you ...
*August 18, 2015*

**Algebra**

I have a problem that reads as: -4x-2y=12 4x+8y=-24 And when solved the answer is (2,-2), but I checked the answer in the back and it says (6,-6) How does that WORK??
*August 18, 2015*

**Science**

Yay. Thank you😊
*August 18, 2015*

**Science**

1. Scientists are not concerned with the human impact on the environment. True False 2. The environment in our lifetime is the same as it was hundreds of years ago. True False 3. Weather usually affects small areas True False 4. The atmosphere is one part of the environment ...
*August 18, 2015*

**Social studies.**

Thank you
*August 18, 2015*

**Social studies.**

The earliest type of trade was A. Bartering B. Currency C. Economies D. Cowry shell currency Is the answer A? Thank you
*August 18, 2015*

** Language Arts**

Identify the antecedent for the underlined pronoun in the sentence below. The boy was excited about his date with Sheila, but he didn't know how (it) would turn out. It is underlined A. boy B. date C. Sheila Is the answer B? Thank you
*August 18, 2015*

**Math**

What is the 11th term of the following geometric sequence? Enter a whole number 7/9,-7/3,7,-21,63
*August 1, 2015*

**stats**

1)Suppose that the weight of tomato juice in mechanically filled cans follows a normal distribution with a mean of 464 grams and a standard deviation of 8 grams. a)A random sample of size n = 18 cans is taken. Will the sampling distribution of the sample mean weight be normal...
*June 28, 2015*

**philosophy **

What is the notion “good” mean for Kant? How does this lead him to the categorical imperative (provide and fully explain at least two formulations)? Provide example(s) of your own regarding how one might use the categorical imperative to determine a course of action...
*June 20, 2015*

**philosophy **

How are values established according to Hume? What human characteristics does he privilege in determining a value system and how do they inform our morality? How are they related to “Utility” and “Justice”? Are you convinced by his characterization of ...
*June 20, 2015*

**math plz help quick**

Here are the answers Combinations Quiz For conexus: 1.C 2.A 3.C 4.D 5.D 6.B 7.D 8.B 9.C If you want show get some wrong on purpose so you teacher won't get suspicious. :)
*May 21, 2015*

**chemistry**

How much heat energy, in kilojoules, is required to convert 37.0g of ice at −18.0 ∘C to water at 25.0 ∘C ?
*May 9, 2015*

**physics**

Bill has a mass of 66.9 kg. Jane has a mass of 58.8 kg. If they are seated 2.2 m apart, how much gravitational force attracts them?
*May 3, 2015*

**chemistry**

Three gases (8.00 g of methane, CH4, 18.0 g of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 ∘C, the total pressure in the container is 4.50atm . Calculate the partial pressure of each gas in the container. Express...
*May 1, 2015*

**algebra NEED HELP**

I've tried to do these problems multiple times and I'm just so confused. 1. (root x-5) + 5 = 0 2. (root 2-7x) = 2x Thanks!
*April 29, 2015*

**Math**

Ana had some money. she used 4/7 to buy shoes which cost $96. if she spent another 2/7 to buy a dress how much would she spend altogether?
*April 22, 2015*

**physics**

Choose one of the Laws of Thermodynamics (zeroth, first, second, or third) and give a brief summary of its development. Who is credited with "discovering" it and when? How did the four laws come to be ordered as they are? Please explain in detail
*April 14, 2015*

**physics**

pls someone should solve dis
*April 12, 2015*

**science**

what is electrical deduction?
*March 24, 2015*

**physics **

At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of F = 88.9 N at an angle of 56◦ , as shown in the figure. The acceleration of gravity is 9.8 m/s 2 . The box of books has a mass of 17 kg and ...
*March 15, 2015*

**trig**

a balloon is tethered to the ground by a string 5 m long if the string makes an angle of 65 degrees with the ground how high above the ground is the balloon
*March 13, 2015*

**Chemistry**

Assuming that the lab procedure was conducted in an identical manner in all other respects, if a large quantity of vinegar had been taken initially for analysis, for example, a 50.0 ml instead of 25.0mL discuss briefly how each of the following would change. A. the moles of ...
*March 13, 2015*

**Chemistry**

I did a lab on vinegar and titration. The question asks.. In the titration of acetic acid and NaOH the use of the color indicator mandates that excess base be present to detect the reading endpoint. Will this cause the calculated and reported mass percent of acetic acid in ...
*March 13, 2015*

**periodic functions(math)**

Is there somewhere a person can see the answer?
*March 12, 2015*

**Science (Chemistry)**

What is the "E2" at the end of your answer? @DrBob222
*March 9, 2015*

**Science**

ok what is the correct answer I am freaking out
*February 18, 2015*

**Physics **

Well, I just found out that I failed my physics midterm. I got a 51. Yes I studied but I still don't get the forces and inclined planes. And my parents are going to kill me if they find out. The midterm brought down my grade to a 79!! Any advice? P.S I also got a 71 on my ...
*January 28, 2015*

**College Algebra**

Suppose that $6,400 is invested at 0.5% interest, compounded monthly. How much, to the nearest penny, is in the account after 7 years?
*January 23, 2015*

**Chemistry**

I have two questions that I do not know how to answer. Thanks for your help! 1. Calculate the [OH^-], [H^+], pH, and pOH for a 0.50M solution of CN^- 2. Calculate the molar solubility of PbCl2 in 0.40M KCl
*January 11, 2015*

**Chemistry**

How would you determine if a given compound is acidic, basic or neutral? Also if given a compound, how would you determine if the state is aqueous (without a chart)?
*January 4, 2015*

**algebra**

5 square root of 145
*December 16, 2014*

**Physics**

A block of mass m is pulled across a level surface by a rope that makes an angle θ with the horizontal. The coefficient of friction is μ. (a) Determine the amount of force F required to slide the block at a constant velocity. (b) Determine the optimum angle at which ...
*December 3, 2014*

**physics**

A man pushes 100.0 N on the handle of a 40.0 kg lawnmower. The applied force is in the same direction as the handle, which is tilted 35.0° relative to horizontal. The coefficient of kinetic friction is 0.10. Find the amount of acceleration.
*December 3, 2014*

**physics**

You create a plot of T2 (in s2) vs mass (in kg) and the linear fit of your graph gives a slope of 0.12735 ± 0.01234. What is the value of the spring constant you took the data with? i am not sure what to do. i know the k=1/slope but im not sure how to start to solve ...
*December 1, 2014*

**Chemistry**

Hi Chris, I believe I am in your Intro Chem class at Alfred State. To do this problem, all you have to do is substitute the equation C(s) V(s)= C(d) V(d)... C stands for the moles (concentration) and the V stands for the mL (volume) if you plug the numbers into the equation...
*November 29, 2014*

**math**

A tank holds 15 litres of water.A cup holds 3/10 of a litre. How many cups of water does the tank hold
*November 18, 2014*

**Science 8 - Check Answers**

I would say the answer for #4 is Electromagnetic energy, Because it cant be Motion energy, or magnetic energy, or gravitational energy either. So id say Electromagnetic.
*November 14, 2014*

**art/photography**

1. In sandy skoglunds THE COCKTAIL PARTY what was the artist contrasting? 2. What did the artist say about her work? 3. What does the artist deal with in all of her illustrations? 4. What happens to sandy skoglunds installations pieces and what become of the work of art? 5. ...
*November 9, 2014*

**Physics**

A 24.00 kg block at rest on a horizontal frictionless air track is connected to the wall via a spring. The equilibrium position of the mass is defined to be at x=0. Somebody pushes the mass to the position x=0.3500 m, then lets it go. The mass undergoes simple harmonic motion ...
*November 8, 2014*

**Algebra please help **

A grocery store sells snacks by weight. A six ounce bag of mixed nuts costs $3.60. Predict the cost of a two ounce bag. Please help answer
*November 4, 2014*

**Algebra please help answer**

Gina's art teacher mixes 9 pints of yellow paint with 6 pints of blue paint to create green paint. Gina mixes 4 pints of yellow paint with 3 pints of blue paint. Did Gina use the same ratio of yellow paint to blue paint instructed by her teacher? Explain. Is it 9/6 to 4/3...
*November 4, 2014*

**English**

Which of the following stylistic movement best represents Weird Al Yankovic's song Canadian Idiot? Would it be existentialism, modernism or postmodernism and why?
*November 3, 2014*

**finamce**

Define captital structure weights)Templeton extended care facilities, inc., is considering the acquisition of a chain of cemeteries for $400 million. Since the primary asset of this business is real estate, Templetons management has determined that they will be able to borrow ...
*November 2, 2014*

**Math**

On December 16, 1811, an earthquake occurred near New Madrid, Missouri, that temporarily reversed the course of the Mississippi River. The quake had a magnitude of 8.8. On October 17, 1989, a calamitous quake measuring 7.1 on the Richter scale occurred in San Francisco during ...
*October 31, 2014*

**Algebra please help out**

Would part B be 180/252, and would part C be 252/10? Please let us know if correct thx
*October 29, 2014*

**Algebra please help out**

Tomas makes balloons sculptures at a circus. In 180 minutes, he uses 252 balloons to make 36 identical balloon sculptures. Part A question how many minutes does it take to mAke one balloon sculpture? How many balloons are used in one sculpture? b. What is Toma's unit rate ...
*October 29, 2014*

**Algebra please help out**

Ed is using the recipe shown to make fruit salad. He wants to use 30 diced strawberries in his fruit salad. How many bananas, apples, and pears should Ed use in his fruit salad? The fruit salad recipe reads 4 bananas, diced, 3 apples diced, 6 pears diced and 10 strawberries ...
*October 29, 2014*