# Posts by MArie

Total # Posts: 1,474

**Science**

Why is the energy released to break a triple bond not three times the energy to break a single bond?

**health**

c

**Trigonometry**

Solve sin 2x + sin x = 0 for 0 (Less then or equal to) x (Less then or equal to) 2pi.

**Trigonometry**

Find the exact value of tan2(Beta) if sin(Beta) = 5/13 (Beta in Quadrant II)

**Trigonometry**

Find the exactly value of sin2(alpha) if cos(alpha) = 4/5 (alpha in Quadrant I)

**Trigonometry**

If cot 2(Theta) = 5/12 with 0 (less than or equal to) 2(Theta) (Less than or equal to) Pi, find the cos(Theta), sin(Theta), and tan(Theta).

**Trigonometry**

Prove that sin^2(Omega) - Cos^2(Omega) / tan(Omega) sin(Omega) + cos(Omega) tan(Omega) = cos(Omega) - cot (Omega) cos (omega) If could explain, please. That would be great (:

**Trigonometry**

Prove that 1+tan(Theta)/1-tan(Theta) = sec^2(Theta)+2tan(Theta)/1-tan^2(Theta) If you explain, that would be great (:

**Trigonometry**

Prove that tan (Lambda) cos^2 (Lambda)+sin^2 (Lamda)/sin(Lambda) = cos (Lambda) + sin (Lambda)

**civilization**

15. The Eastern European state that gained its independence from the Ottoman Empire in 1830 was: (Points: 5) Serbia. Greece. Bosnia. Romania.

**civilization**

The Congress of Vienna in 1815 :Was it operated in accord with the principles of liberalism

**civlilization**

yes it is ..your right

**civlilization**

All of the following are correct about nineteenth century Liberalism EXCEPT: A. having economic and political components. B. supporting the idea of civil rights. C. wanting to limit governmental power. D. opposing limiting governmental power.

**History**

List three “rights” from the United Nations Declaration which are not in the Canadian Charter.

**science**

BeatriceJoy

**Physics**

A scuba diver must decompress after a deep dive to allow excess nitrogen to exit safely from his bloodstream. The length of time required for decompression depends on the total change in pressure that the diver experienced. Find this total change in pressure for a diver who ...

**health**

What is intensity?

**algebra**

if a student rank in a class 400 is 87 waht id the student percentile rank

**trig**

A tunnel for a new highway is to be cut through a mountain that is 260 feet high. At a distance of 200 feet from the base of the mountain, the angle of elevation is 36 degrees. From a distance of 150 feet on the other side of the mountain, the angle of elevation is 47 degrees...

**trig**

A tunnel for a new highway is to be cut through a mountain that is 260 feet high. At a distance of 200 feet from the base of the mountain, the angle of elevation is 36 degrees. From a distance of 150 feet on the other side of the mountain, the angle of elevation is 47 degrees...

**Math**

in the center of the first sheep of graph paper, draw a figure with straight sides that will fit in a 15 by 20 block (the figure can be hard or easy so I was thinking of going with a simple rectangle). On the second sheet of graph paper draw the same figure with so that is ...

**Math**

So I have to draw two rectangles on graph paper that each have to fit in a 15 by 20 block. The first rectangle can be what ever size you want but the second one needs be similar with a 3/5 ratio of the first. I can't figure out what their sizes should be.

**trig**

1) Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x. cos 4x 2) Use half-angle identities to write the following expression, using trigonometric functions of x instead of x/4. sin x/4

**social studies**

The Abbe Sieyes suggested that the meeting of the Third Estate be renamed the National Assembly. What was the significance of this change? Explain.

**algebra 2/help**

7) A theater is staging a series of 10 different plays.You want to attend at least 2 of the plays.How many different combinations of plays can you attend?

**algebra 2/help**

7) A theater is staging a series of 10 different plays.You want to attend at least 2 of the plays.How many different combinations of plays can you attend?

**chemistry / help please**

For each reaction,which ion in the precipitate was responsible for the color 1-reaction of Sodium Hydroxide and Copper(II)Sulfate 2-reaction of Sodium Sulfate and Barium Chloride. 3-reaction of Sodium Hydroxide and Iron(III)Sulfate. 4-reaction of Sodium Hydroxide and Nickel(II...

**Programming with Eclipse**

Design, implement, test, and debug an application to compute an employee’s weekly pay. If the employee works more than 40 hours a week, the employee earns 1.5 times the basic hourly pay for any time worked over 40 hours. The program should allow the user to input the ...

**More spanish to check/please**

3- YO conozco una reportera famosa . Is it right?

**More spanish to check/please**

Use saber or conocer. 1-Francisco sabe escribir para revistas 2-Jorge y Anita conocen Miami 3-Yo conozco una reporta famosa 4-Alma conoce cuántas personas viven en Miami 5-Yo se la dirección del canal de televisión THANK YOU...

**spanish/check please**

Underline the best word. 1-Quiero viajar mucho y (conocer/ saber)los paises del mundo. 2-(Sé/Conozco)un poco de espanol. 3-No puedo decir que(Sé/ conozco) a muchos espanoles,pero si tengo algunos amigos que viven en Espana. 4-(Conozco/Sé) muy bien a Juan ...

**world geography**

the speaker is an Afghan solider thank you

**world geography**

is this an example of ethnocentrism "Why did you go to England for your education? Afghanistan doesn't need your foreign ideas."

**chemistry**

1-Barium sulfate and strontium sulfide both are placed into beaker of water. a- Will the strontium sulfide dissociate? ....... - If it does,write the equation showing the dissociation.

**math**

The width of a rectangle is x inches long. The length of that rectangle is 5 inches less than Twice the width. If the perimeter measures 26 inches, what is the measure of the length and width of the rectangle.

**Calculus**

A cattle rancher wants to enclose a rectangular area and then divide it into six pens with fencing parallel to one side of the rectangle (see the figure below). There are 480 feet of fencing available to complete the job. What is the largest possible total area of the six pens?

**chemistry**

What is the physical state of Ca3(PO4)2 and the physical state of NaCl?

**Applied Calculus-Question for Damon**

Hi, I have two other questions for Applied Calculus but they have graphs and I am unable to post them in here. Is there a way you could help me out with the questions?

**Applied Calculus**

For the average person that is still growing, the rate of change in weight W (in pounds) with respect to height h (in inches) is approximately dW/dh=0.0015h^2 pounds per inch. Suppose that the average person that is 60 inches tall weighs 108 pounds. Find the weight of an ...

**Applied Calculus**

Suppose that an object is thrown down towards the ground from the top of the 1100-ft tall Sears Tower with an initial velocity of – 20 feet per second (the negative velocity indicates that the object is moving towards the ground). Given that the acceleration due to ...

**Algebra**

I posted this earlier but it didn't get answered. So I'm posting it again with hopes that, this time, it will be answered. Please solve for x: |x-6|>7 I got x=6 as a final answer, but that doesn't make sense because 6 is not greater than 7. Please help!! Thanks...

**math**

I'm guessing 24

**Algebra**

I posted this last night but it didn't get answered. So I'm posting it again with hopes that, this time, it will be answered. Please solve for x: |x-6|>7 I got x=6 as a final answer, but that doesn't make sense because 6 is not greater than 7. Please help!! ...

**Physics (Urgent Please!)**

Two parallel wires conduct equal currents in the same direction. (a) At a point in the plane of the wires midway between them, do the individual fields of the wires cancel or reinforce each other? (b) At a point far away from the wires, do their individual fields tend to ...

**math**

Tenths would be 13.0. Tens would be 10.

**math**

13.0. The 8 in the hundredths place is 5 or over, so you round it up. That makes the 9 in the tenths place a 10, which makes the number to the left of the decimal place 13. Remember to add the 0 in the tenths place as a place holder.

**math**

If it is supposed to be rounded/estimated to a whole number, it would be 22.

**math**

If you are rounding/estimating to the nearest whole number, it would be 6. If it is to the tenths place, it would be 6.3.

**Life orientation**

five ways in which the environmental substance abuse problem impacts on the community.

**Algebra**

Solve for x: |x-6|>7

**Math**

Estimate the number of pints In 445 ounces?

**math**

135/ = b/360

**7th math**

what does 252/_= w/260

**Chemistry PLZ HELP!!!!!**

I also need the answer

**Math--Algebra 1**

I really need help on this problem. I'm unable to concentrate because I have to memorize a whole play script today too, so I'm kind of stressing a bit too much for this one problem. The problem is "Marcy has a total of 100 dimes and quarters. If the total value of...

**Physics**

A particle with a charge of -4.50x 10^-10 C and a mass of 6.6x 10^-18 kg is placed between two oppositely charged parallel plates with a voltage of 9.00x 10^5 V. The particle is injected at the negative plate with an initial speed of zero. What is the final speed of the ...

**pre-ap math**

the diagonal of a rectangular poster is 25 in. The width is 15 inches. If madison wants to put a border on the edge of the poster , how many inches will she need to buy?

**chemistry**

A sample of N2 gas occupies a volume 180 mL at STP. What volume, in L, will it occupy at 640 mm Hg and 295 K?

**chemistry**

What is the total pressure in a 4.00 L flask at 298 K, that contains 2.6 moles of He, 0.8 moles of Ne, 1.6 moles of O2?

**chemistry**

A mixture of 8.95 g of Cl2 and 18.0 g of NO2 and an undetermined amount of SO2 occupies a volume of 22.4 liters at 760 mm Hg and 0 C. How many moles of SO2 are present? I keep coming up with 62 and that is not right. Someone please help!!

**chemistry**

What is the volume at STP, in liters, occupied by 26.4 g of F2 gas?

**chemistry**

What is the R for? What answer do you get? I come up with 62 but that is not right.

**chemistry**

A mixture of 8.95 g of Cl2 and 18.0 g of NO2 and an undetermined amount of SO2 occupies a volume of 22.4 liters at 760 mm Hg and 0 C. How many moles of SO2 are present?

**Algebra 2**

A measurement y varies directly with regard to another value x. If y = 9 and x = 24, find x for y = 25.

**Math**

The fixed cost is $500,000 and the variable cost is $.50 per cd. The company sells each CD to record stores for $5. X represents the number of cds produced and sold. How many disks must be sold for the company to break even?

**English**

This is a run-on sentence.

**chemistry**

Hydrogen and oxygen react to produce water according to the equation below. 2 H2 + O2 2 H2O How many liters of hydrogen at STP are needed to produce 0.24 mol H2O?

**Math**

greater than or equal to an 88%.

**Math Problem**

42x^3+37x^2+29x+4

**5th grade Math**

yes, it is b

**Opinion**

Which class would be better(easier) to take Earth Science or Astronomy?

**algebra**

combine like terms 11/14a-1/15b+1/14a-11/15b

**algebra college**

multiply and simplify 3^-2-3^6

**Chemistry**

Bonjour mon ami... Ca va? La chemie est un excellent science n'est-ce pas? Alors je vais partir maintenant, aie une bonne vie!

**math**

April 14 + 5 days = April 19 (Anthony) April 14 + 6 days = April 20 (John) 6 days x 5 days = 30 days April 14 + 30 days = May 14, Monday

**algebra**

for h(x)-4 find h(7)

**Math**

48 is 88% of what number

**Algebra**

A company produced 2,590,000 small appliances in one year and made a profit of 6,590,000. What was the profit of each appliance? Express the answer in scientific notation in two decimals

**Math**

Solve by completing the square, 8x^2+4x-4=0

**Math**

The length of a rectangle is 10cm greater than the width. The area is 551cm^2. Find the length and width

**Math**

eff cuts lawns for $20.00.next year, he will charge $4.00 more per lawn. what is the percent increase will he charge

**Math**

In a right triangle, find the length of the side not given. Approx to the three decimal places. a and b are the length of the legs and c is the length of the hypotenuse. b = 4"sqrt"2 and c = 9

**Math**

Police use a formula s = S √1/L , where S is the test-car speed and L is the test-skid length, to find the actual speed s in an accident which left a skid mark of l. Find the actual speed s (nearest whole mph) when S=45 mph, 1=150 ft, L=100 ft.

**Mathematics__Please help**

$M is just sufficient to pay for the wages of one qualified teacher for x days or the wages of one relief teacher for y days. For how many days will $M be sufficient to pay for the wages of one qualified teacher and one relief teacher? Give your answer in terms of x and y.

**reeading**

I like fantasy novels! My favorite novel is Harry Potter.

**Math**

The electric current I in a circuit varies directly as the voltage V. When 21V are applied, the current is 4A. What is the current when 18 volts are applied

**Mathematics**

Express the following as a fraction with a single denominator: 1/(2a-3) - 2/(3-2a) + 18/(9-4a^2)

**MATH**

MRS. M IS GOING TO PUT DOWN TILES ON HER KITCHEN FLOOR. SHE PLANS TO USE A PATTERN WHERE THERE WILL BE 3 SQUARE TILES FOR EVERY 1 TRIANGULAR TILE. IF SHE USES A TOTAL OF 900 TILES, HOW MANY OF THOSE ARE IN TEH SHAPE OF A SQUARE?

**Math**

Express the following as a fraction with a single denominator: 1/(2a-3) - 2/(3-2a) + 18/(9-4a^2)

**Math**

15*2.5 =37.5 ft

**criminal procedure**

In which areas of search and seizure do you feel that the courts have not gone far enough? In which areas of search and seizures do you feel that the courts have not gone far enough? suport your position. Use actual court cases to support position.

**math**

a perso increases the number of tosses of a fair coin the actual number of heads will get farther and farther away from the number of tosses divided by 2

**Humanities**

I need to find 2 quotes from both John Locke's Of Civil Government and Jefferson's Declaration of Independence and tell how John Locke influenced Thomas Jefferson to write the Declaration....

**Humanities**

Quote at least two pairs of related lines from the Declaration of Independence and from John Locke's Of Civil Government. support the idea that Thomas Jefferson was influenced by Locke.

**math**

The order of magnitude of the radius of our solar system is 10 to the 13th power meters. the order of magnitude of the radius of the visible universe is 10 to the 13th power times as great. find the approximate radius of the visible universe. can anyone explain to me how to ...

**physics**

calculate the force of gravity between earth (mass = 6.0 x 1024kg) and the moon (mass = 7.4 x 1022 kg). the average Earth-moon distance is 3.8 x 108 m.

**personal finance**

calculating future value of retirement account in which you deposit $2,000 a year for 30 years with an annual interest rate of 7 percent?

**personal Finance**

Pam Thompson is offered a salary of 28,000. The company gives annual raises of 6 percent. What would be pam,s salary during her fifth year on the job.

**personal finance**

what would be the future value of 280,000 based on an annual interest rate at 6 percent?

**7th science**

acceleration=force divide by mass . How do you solve 20m/s2 =unknown divide by 0.15kg