# Posts by Anonymous

Total # Posts: 116,390

math
Solve the following system: 2x-6y = 26 3x+5y = -3

Biology
how is fungi beneficial to humans, other animals, and the ecosystem?

chemistry
The normal boiling point of liquid butanol is 391 K. Assuming that its molar heat of vaporization is constant at 45.9 kJ/mol, the boiling point of C4H9OH when the external pressure is 0.647 atm is

Chemistry
Consider separate 1.0-L samples of He (g) and UF6 (g), both at 1.00 atm and containing the same number of moles. What ratio of temperatures for the two samples would produce the same root mean square velocity? T UF6/T He= x/1.0

ChemistryDiethyl ether () was one of the first che
Diethyl ether was one of the first chemicals used as an anesthetic. At 34.6°C, diethyl ether has a vapor pressure of 760. torr, and at 18.5°C, it has a vapor pressure of 413 torr. What is the ?H of vaporization for diethyl ether?

math
Hi y’all, me again. Can you help me on this? I got some answers, and I hope they are all right. Please let me know! Thanks! :) 1.2(y + 1) for y = 2 A. 6 B. 5 C. 7 D. 8 Is it “A”? 2. The cost in dollars of a school banquet is 74 + 12n, where n is the number of ...

Ms. Sue
-NOT A QUESTION- I do apologize for giving everyone the answer today, however, I do not apologize for standing up for myself. Don't stop reading there. This IS a great website, and it's really helpful, I just have a short temper today. I was up almost all night taking...

Physics Question
I'm having some trouble understanding circular motion. I know that centripetal force is equal to string tension, but should the two always equal the force of gravity?

As the public uproar over generic drug and off-patent, off-exclusivity branded drug price gouging heightens, state experts and patient activists in Maryland are lobbying for politicians to implement a law that would prohibit price gouging of important off-patent non-brand ...

math
@lola do you go to connexus?

the marginal cost function for a manufacturing company is given by dollars per box,c'(q)=q^2-10q+30 where q is the number of boxes manufactured. If , find the total cost of manufacturing 10 boxes. Round to the nearest dollar.

math
Taxi Express charges \$2.60 plus \$3.65 per mile, and Cab Cruiser charges \$2.75 plus \$3.90 per mile. Which expression represents how much more (in dollars) Cab Cruiser charges than Taxi Express for a ride of mm miles?

math (calc)
A baseball team plays in a stadium that holds 70000 spectators. With the ticket price at \$11 the average attendance has been 30000. When the price dropped to \$9, the average attendance rose to 35000. a) Find the demand function p(x), where x is the number of the spectators. (...

math,
85/450 were rotten 450-85=365 365/450 were not rotten

Grammar
Which is correct? I hope she gets well soon. OR I hope she get well soon.

Biology
can anyone explain or give examples of how fungi is beneficial to humans, other animals, and the ecosystem, or how it can be.

All correct

it is right

algebra- can anyone help?
you can check out khan academy, there are great videos that can explain factoring and the opposite

Calculus
A manufacture has been selling 1050 television sets a week at \$480 each. A market survey indicates that for each \$25 rebate offered to a buyer, the number of sets sold will increase by 250 per week. a) Find the function representing the demand p(x), where x is the number of ...

Calculus
The profit function for a computer company is given by P(x)=?x^2+36x?26 where x is the number of units produced (in thousands) and the profit is in thousand of dollars. a) Determine how many (thousands of) units must be produced to yield maximum profit. Determine the maximum ...

CHEMISTRY
how is .5 of o2 used?

CHEMISTRY
I'm confused how to get this answer This is my ice chart 2NO + O2 = 2NO2 I 3 2 - C 2x x x E 3+2x 2+x x

CHEMISTRY
Exactly 3.0 mol NO and 2.0 mol O2 were placed in a 1.00-L flask. These gases react as follows: 2 NO + O2 2 NO2 . At equilibrium, the mixture contained 2.0 mol NO2. What is the Kc for the reaction above? A 0.50 B 1.00 C 2.0 D 2.5 E 4.0

Finite Math
Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing four red marbles, two green ones, three white ones, and two purple ones. She grabs eight of them. Find the probability of the following event, ...

History
ms.sue is rude af

Math
A game consists of you rolling one fair 6-sided die and observing the number that appears uppermost. If you roll a 2 or a 4, then you win \$10. If you roll a 6, then you win \$20. If you roll any other number, then you do not win any money. Find your expected net winnings for ...

science
The product of frequency and wavelength of a sound wave is equal to its

algebra
Truck Rental Plus charges its customers based on a linear model. the table to the right depicts this data. they charge their customers \$95 for using their truck for a total of 100 miles and \$140 for using their truck for a total of 200 miles

calculus
A tank of water has a base a circle of radius 2 meters and vertical sides. If water leaves the tank at a rate of 6 liters per minute, how fast is the water level falling in centimeters per hour? [1 liter is 1000 cubic centimeters]

Calculus
A box has rectangular sides, top and bottom. The volume of the box is 3 cubic meters. The height of the box is half the width of the base. Express the total surface area of the box in terms of the height of the box.

math
at carolina place mall, gina bought a blouse(x), a pair of shoes(y), and a pair of jeans(z). If she paid with a \$100 bill, write an expression that represents the amount of change she received.

college algebra
10x+10y+20=1850 20x+20y+10z=2200 20x+10y+10z=1500

college algebra
and investor has a total of \$24,900 deposited in three different accounts which earn annual interest rate of 7% 6% and 4%. the amount deposited in the 7% account is twice the amount in the 6% account. if the three accounts earn a total annual interest of \$1412 how much money ...

college algebra
an investment of \$6600.00 is divided between two simple interest accounts. On one account the annual simple interest rate is 9% and on the second account the annual simple interest is 5.5% How much should be invested in each account so that the total interest from the two ...

college algebra
an investor has a total of \$24,900 deposited in three different accounts which earn annual interest rate of 7%, 6%, and 4%. the amount deposited in the 7% account is twice the amount in the 6% account. if the three accounts earn a total annual interest of about \$1412 how much ...

college algebra
a chemist has two alloys one of which is 5% gold and 15% lead and the other of which is 25% gold and 30% lead how many grams of each of the two alloys should be used to make an alloy that contains 40g of gold and 93g of lead ?

Social studies
Plz can someone number them

As public uproar over generic drug and off-patent, off-exclusivity branded drug price gouging heightens, state experts and patient activists in Maryland are lobbying for politicians to implement a law that would prohibits price gouging of important off-patent non-brand drugs. ...

math
5555

Math
The Davis family try shopping in a different supermarket to save money. They used their old supermarket one week, then bought the same items the next week in the new supermarket. In the first week their bill was £105.20. In the second week it was £98.50. a) What ...

history

history
Austin

history
i did

Algebra
Write y=1/6x+4 in standard form using integers. Help?

math
Draw a right triangle having hypotenuse of length 5.6cm and with one of the acute angles 30°

math
average age of 20 men is 50yr.5 new men,whose average age is 40yr,join them.find average age of all men?

math
if interest on rs1500 be more than interest on rs1200 by rs90 in 6yrs.find rate%

Biology
Can someone explain how negative feedback helps the body maintain homeostasis?

physics
The 90-kg man, whose center of gravity is at G, is climbing a uniform ladder. The length of the ladder is 5 m, and its mass is 20 kg. Friction may be neglected. (a) Compute the magnitudes of the reactions at A and B for x =1.5 m. (b) Find the distance x for which the ladder ...

chemistry
Calculate the mass CaCl2 · 6 H2O needed to prepare of 0.123 m CaCl2(aq), by using 373 g of water. Answer in units of g.

CHEMISTRY
1. Give reasons for your choice. 2. Give reasons for rejecting other options 6. In a chemical reaction at constant temperature, the addition of a catalyst A increases the value of the equilibrium constant. B increases the fraction of molecules with more than a given kinetic ...

CHEMISTRY
1. Give reasons for your choice. 2. Give reasons for rejecting other options. The reaction C(s) + O2(g) CO2(g) + heat reaches equilibrium in a closed reaction vessel. Which one of the following actions causes the equilibrium to shift to the right ? A increasing the volume of ...

chemistry
Calculate the mass CaCl2 · 6 H2O needed to prepare of 0.123 m CaCl2(aq), by using 373 g of water. Answer in units of g.

chemistry
I do not understand how to get the last step.

chemistry
A solution prepared by adding 0.17 g of a polymer to 0.6 L of toluene (methylbenzene, a common solvent) showed an osmotic pressure of 0.808 Torr at 21â—¦C. What is the molar mass of the polymer? Answer in units of g/mol.

math
Suppose that there are two types of tickets to a show: advance and same-day. Advance tickets cost \$40 and same-day tickets cost \$20 . For one performance, there were 55 tickets sold in all, and the total amount paid for them was \$1800 . How many tickets of each type were sold?

Use the figure to answer questions 1-3 file:///C:/Users/Student/Downloads/642756-212012-25329-PM-1227809791%20(1).png 1. Name a pair of complementary angles. ?1 and ?4 ?1 and ?6 ?3 and ?4 ?4 and ?5 2. If m ?1 = 53°, what is m ?4? 53° 43° 37° 27° 3. If m ?1...

MATH
if so do 1/3 divided by 5/1

MATH
is it 1/3?

MATH
Kyle has 1 3 of a gallon of apple juice. If he divides the apple juice into 5 equal servings, how much apple juice will he have in each serving?

toxicology
dichlorodiphenyltrichloroethane (DDT). What was DDT initially used for, and how does it work as a pesticide? Explain the benefits of DDT, and then discuss how DDT moves through the environment.

Three cars contain different masses inside them. They all move at a constant speed. What is the net force on each car? I think the net force is 0 on all the cars because there can't be any acceleration when they move at a constant speed.

Math
Determine the interest earned for a 23-year investment with an interest rate of 2.8% compounded daily, if the Future Value is \$44800 A) 21 271.02 B) 208.60 C) 20 955.11 D) 20 409.95

Math
Principal of \$600 is invested at 3.6% a simple interest, paid annually for 12 years. What is the rate of return? A) 43.2 B) 21.6 C) 7.2 D) 0.6

Math
Help please. A person made semi-annual deposits of \$490 into an account that pays 5.1% a interest compounded bi-weekly, for 6 years. Determine the future value of the investment. N= I= PV= PMT= (FV) = P/Y= C/Y=

Chemistry
The amino acid glycine, C2H5NO2, is one of the compounds used by the body to make proteins. The equation for its combustion is 4C2H5NO2(s) + 9O2(g) -------------> 8CO2(g) + 10H2O(l) + 2N2(g) For each mole of glycine that burns, 973.49 kJ of heat is liberated. Use this ...

Chemistry
Calculate the molar enthalpy of reaction per mole of carbon in the following reaction: 3 C(s) + 2 Fe2O3(s) + 466 kJ c12-u3_files/i0210000.jpg 4 Fe(s) + 3 CO2(g) a. +466 kJ/mol C b. +155 kJ/mol C c. +117 kJ/mol C d. –466 kJ/mol C e. –155 kJ/mol C

Math-Problem Solving
A man is crossing a narrow bridge. When he is 3/8 of the way across the bridge, he hears a train traveling 60 miles per hour coming behind him. He figures that he has exactly enough time either to run back or to run forward and miss the train. How fast can the man run?

civil education
Identity and list at least five each. 1.major local civil problem 2.major world civil problem

Physics
A weightlifter raises a 200 kg barbell over his head from the floor a displacement of 2m in 2.2 seconds. What is the average power he develops during the lift?

Physics
What is the velocity of a 5000 kg truck whose KE is 360 oK?

Calculus
A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus, the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 20 ft, find the dimensions of the window so that the greatest possible amount of light is ...

Calculus
A rectangular storage container with an open top is to have a volume of 10 m3. The length of its base is twice the width. Material for the base costs \$9 per m2. Material for the sides costs \$150 per m2. Find the dimensions of the container which will minimize cost and the ...

physics
1.07 *10^3

physics
175 mi/h = 78.2 m/s change in momentum = 78.2 * m force = change in momentum / time 4.2*10^6 = 78.2 * m / 2 solve for m

MATH
Madalyn wants to buy a dollar-sign 700 stereo set in 9 months. How much should she invest at 5 % simple interest to have the money then?

Math
Find the cost of pulling a fence around a square field at Rs 15 per meter is Rs 432 . find the length of each side of the field.

math
what is the 1/3 of 84

Chemistry
1)Scientific mechanism behind lipid oxidation 2) How metal ions and light affect lipid oxidation

maths
y is directly proportional to x. y=36 when x=5. By writing an equation of proportionality, work out the value of y when x=8.

math
Sorry for late reply, but after multiplying 3 ? ?b^3 in num and dom, I am stuck at a^(6/2)/b^(3/2), which I believe, is incorrect.

math
Big Question: To rationalize a fraction means to remove all non-rational numbers from the denominator of the fraction. Rationalise (a^2)/(3+?b^3) by multiplying the numerator and denominator by 3 ? ?b^3, and then evaluate if b = a^2 and a = 2. Show all of your working.

math

math
yeah, extremely sorry about that, though the question was to compare these two numbers (one w/ and w/o indices), and I only gave you half of the pie, so I'm really sorry about that. But, I'll try to think of a nickname, thanks for the suggestion.

math
hm. I feel so stupid now.

math
Solve for x and y if 5^(x?y) = 625 and 3^(2x) × 3^y = 243. (note: I posted a similar question to this before, but this uses indices) (Also note: Answer is, x = 3, y = -1 ; 7, and the question if inputted into an online calculator, is incorrect.) Thnks for your time.

Math
90

math
Alright, thanks so much for the help!

math
Solve for n: ((3^n)^n*(3^n)^-1) / 81 = 1 Answer (n) = -1, 4 I have no idea how n = -1, 4. Also, please don't ask if the answers are actually wrong or not, they are directly from the text book.

math
Solve for x and y if 5x?y = 625 and 32x × 3y = 243. Hence, evaluate 35x/7^(?2y) × 5^(?3y) Need help for solving x and y, thanks!

math
Solve the inequality. 1. –6w < 84 w > 14 w < –14 w > –14 w < 14

Physics
A 5-kg container slides down an incline at an angle of 28 degrees. If the coefficient of kinetic friction is 0.4, what is the container's acceleration when it slides down the incline, and how long does it take for the container to travel 14 meters? (Use seconds as the unit...

History
Thank you!

History
Which of the following represents how one branch of government checks the other in foreign policy? A:Congress declares war against Iraq. The Pentagon boosts its troop levels. B:The president signs a treaty with Mexico. Congress must approve the treaty.*** C:The Supreme Court ...

EGlL 1010
So i should choose "Bullying can be stopped," and talk about how bullying if not stopped can impact children when it comes to their education and how cyber bullying is a main cause of students with low self esteem etc?

EGlL 1010
I was wondering if the topic of bullying is debatable. I have to select a debatable topic to focus on. Make an arguable claim, and write a 5-7-page paper examining, evaluating, and supporting my argument. I was thinking I could write 1) Is bullying a big issue around the world...

Maths
The sum of the digits of a two digit number is 12 . If the digits are reversed , the new number is 12 less than double the original number. Find the number

History
What could be some examples of peace in the Gupta Empire? I have found that peace allowed for many achievements in science and math. Could someone explain to me more about peace in the Gupta Empire?

Math
JajA had three ribbon with her . The length of the green ribbon qas2/1/2 times the red ribbon.what is the length of the yellow