Sunday

September 25, 2016
Total # Posts: 389

**Chemistry (equilibrium)**

C2H6(g) <=> C2H2(g) + 2 H2(g) The ΔH° for the reaction above is +312 kJ. The system is initially at equilibrium. In which direction will the reaction shift in each of the following situations? e) The temperature is decreased. g) He is added at constant volume. h...

*September 10, 2016*

**Pre-Calc College**

Two 5-grain aspirin tablets contain 650 mg of the drug. With aspirins half-life of 29 minutes, how much is left in the bloodstream after 2 hours? How long does it take for the level to be equivalent to 10 mg of aspirin? If an individual takes two tablets every 4 hours, what is...

*May 16, 2016*

**Pre-Calc College**

Two 5-grain aspirin tablets contain 650 mg of the drug. With aspirin's half-life of 29 minutes, how much is left in the bloodstream after 2 hours? How long does it take for the level to be equivalent to 10 mg of aspirin? If an individual takes two tablets every 4 hours, ...

*May 16, 2016*

**College Pre-Calc**

a.)Determine the location of the turning points for the cubic y=x^3-3x^2+2x+10. What are the maximum and minimum values for this function? b.)Use the fact that a cubic is symmetric about its point of inflection to determine the location of the point of inflection of the cubic ...

*May 14, 2016*

**Math**

57 is the product of 3 and Helena's savings.

*April 19, 2016*

**Algebra **

what are the domain and range of th function y= 2√3x+4-5? Need HELP, ASAP Thanks

*April 18, 2016*

**Algebra **

what are the domain and range of th function y= 2√3x+4-5? Need HELP, ASAP Thanks

*April 18, 2016*

**Algebra**

Help... ASAP

*April 15, 2016*

**Algebra **

1.what kind of function best models the data in the table use differences and ratios. x y 0 5 1 7 2 9 3 11 4 13 2.write an equation to model the data table. x y 0 3 1 5.3 2 7.6 3 9.9 4 12.2 3.write an equation to model the data table. x y 0 1.4 1 4.2 2 12.6 3 37.8 4 113.4

*April 15, 2016*

**Romeo and Juliet**

oh mine was dropped...

*April 15, 2016*

**Romeo and Juliet**

huh?

*April 15, 2016*

**Romeo and Juliet**

is it a unit test?

*April 15, 2016*

**Romeo and Juliet**

oh ok cool! I can help you. what lesson is this test

*April 15, 2016*

**Romeo and Juliet**

Ohio Connections Academy.

*April 15, 2016*

**Romeo and Juliet**

are u OCA?

*April 15, 2016*

**Algebra**

Help!

*April 15, 2016*

**Algebra **

1.what kind of function best models the data in the table use differences and ratios. x y 0 5 1 7 2 9 3 11 4 13 2.write an equation to model the data table. x y 0 3 1 5.3 2 7.6 3 9.9 4 12.2 3.write an equation to model the data table. x y 0 1.4 1 4.2 2 12.6 3 37.8 4 113.4

*April 15, 2016*

**Algebra**

Ok thank you!

*April 15, 2016*

**Algebra **

what kind of function best models the data in the table use differences and ratios. x y 0 4 1 5 2 8 3 13 4 20

*April 15, 2016*

**Algebra **

what is the value of c so that x^2+13x+c is a perfect square trinomial I need HELP ASAP!!!

*April 15, 2016*

**Algebra**

i'll explain: 1400/x=1000/(x+50)+3 1400(x+50)=1000x+3x2+150x 1400x+70000=3x2+1150x then, 3x2-250x-70000=0 (3x+350)(x-200)=0 x=200 or -350/3 Taking out the negative answer, we get the speed of plane A to be 200kph, and the speed of plane B to be 250kph

*April 15, 2016*

**Algebra**

Plane A speed = 200 mph Plane B speed = 250 mph

*April 15, 2016*

**Algebra **

23. what is the value of c so that x^2+13x+c is a perfect square trinomial I need HELP ASAP!!!

*April 15, 2016*

**Science**

Describe the flow of blood in the human body, including through each four chambers of the heart.Explain how the blood changes as it moves through various locations of the body

*February 9, 2016*

**French**

thankyou Ms.Sue

*December 20, 2015*

**French**

Do these directions in French make sense? Please correct any mistakes. Thankyou!! Recipe Dialogue Title- Poêle Fris Mexicain 1- Tu avez besoin : d'huile riz les oeufs fromage noir haricot 2- tomate l’oignon mexicain épices d’ail (optionnel)pigment ...

*December 20, 2015*

**physics**

ok. Thankyou. Apologize

*December 20, 2015*

**Math**

If $3000 is invested at 6% p.a. compounding yearly, how long will it take to double the value?

*November 14, 2015*

**Calculus**

What is the maximum volume of a closed box with a square base which can be made by bending the material? The box is to have a surface area of 100in^2.

*October 25, 2015*

**Algebra**

A contractor leans a 13-foot ladder against a building. The distance from the ground to the top of the ladder is 7 feet more than the distance from the building to the base of the ladder. Find the distance from the building to the base of the ladder and the distance from the ...

*September 21, 2015*

**Chem**

Joe bought a 2.08 * 10^4 pound tractor trailer to transport his world famous birthday cakes around the country. How many tons was the tractor trailer?

*September 18, 2015*

**Chem**

Precision, Accuracy, and Percent Error: _______________________________________ Suppose a student measures the volume of an aluminum block three times and records the following data: 8.42 cm^3, 8.41 cm^3, and 8.40 cm^3. The accepted volume of the aluminum block is 11.5 cm^3. ...

*September 18, 2015*

**Math**

Thank you!!! That was a HUGE help!!!!!!

*August 31, 2015*

**Math**

The record for the Boston Marathon's wheelchair division is one hour 18 minutes and 27 seconds A) The Boston Marathon is 26.2 miles long what was the average speed of the record winner of the wheelchair division round to the nearest hundredth B) at this rate how long ...

*August 31, 2015*

**Math dimensional anaylsis**

To make a banner for a football game: 9 yard banner can be made in 3 hours. What is the rate of work in feet per minute?

*August 18, 2015*

**mode in central tendency**

The data set 3, 3, 3, 4, 4, 4, 5, 5, 5 is shown. Does this data set have a mode? why or why not?

*May 12, 2015*

**Math **

The data set 3, 3, 3, 4, 4, 4, 5, 5, 5 is shown. Does this data set have a mode? why or why not?

*May 12, 2015*

**Maths**

How to find an angle using measurements

*April 5, 2015*

**Social Studies**

The crusades

*March 6, 2015*

**Health**

I think it would be B!!

*March 6, 2015*

**math**

75=m/3+10

*February 24, 2015*

**chemistry**

The specific heat of iron is 0.498 J/g °C. If 341 J of heat is added to 154.1 g of iron at 25.0 °C, what is the new temperature of the iron?

*February 11, 2015*

**chemistry**

A block of metal is 6.88 cm long, 2.03 cm wide, and 1.85 cm high. It has a mass of 215.1 grams. What is the density of this metal. I've tried adding all the cm up and squaring them, dividing them, multiplying but i can't get the answer

*February 6, 2015*

**Physics**

PHYS1111_HMWK02_Vectors_and_2DKinematics » Eddie the Eagle Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 62.2 m horizontally from the edge of ...

*February 2, 2015*

**Physics**

A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. The ball leaves her club at an angle of 37.0° above the ground, with a speed of 31.1 m/s. Find the time that the ball is in the air before it hits the ...

*February 2, 2015*

**Physics**

Three vectors of lengths A = 45.6, B = 24.2, and C = 30.4. The angles are θa = 29.6° and θb = 57.5°, and C points along the negative y-axis. Determine the length of the vector A - C. Calculate the angle of this vector. Determine the length of the vector A - B...

*February 1, 2015*

**Math**

Hello! Can someone help me with this? Directions: Solve the equation sin^2x-sinx=2 Location on Unit Ciricle: Period: General Solution:

*January 26, 2015*

**Math Homework Help**

Hello! I'm having problems with these two math problems. I've tried to solve them but I got nowhere. If someone could please help me, that would great! Thanks again! :) Directions: Verify the identity for each problem. 1.) cot^2y(sec^2-y-1)=1 2.) cosx+sin xtan x=sec x

*January 18, 2015*

**Physics**

How fast would a 4.8 kg object slide down a frictionless incline of 10.3 degrees?

*January 7, 2015*

**calculus**

A rectangular fence has to be built from both wood and metal so that opposite parallel sides of the fence are made from the same type of material. The wood costs $10 per foot and the metal costs $20 per foot of the fence used. If you only have $400 to spend on material, what ...

*December 8, 2014*

**Physics**

Starting from rest, a speedboat reaches a speed of 2.8 m/s in 2.7 s. What is the boat's speed after an additional 3.7 s has elapsed, assuming the boat's acceleration remains the same?

*October 8, 2014*

**Chemistry, empirical formula**

Na3PO4

*September 23, 2014*

**Phsics**

A crate weighing 600. N is being pulled across the floor. You pull up and to the right on a rope which is attached to the crate. You exert a force of 155 N at an angle θ=29.0° above the horizontal.

*September 15, 2014*

**algebra**

One morning, Justin drove 5 hours before stopping to eat lunch at Pizza Hut. After lunch, he increased his speed by 10 mph. If he completed a 350-mile trip in 8 hours of driving time, how fast did he drive in the morning?

*September 9, 2014*

**algebra**

A garden hose can fill a swimming pool in 7 days, and a larger hose can fill the pool in 4 days. How long will it take to fill the pool if both hoses are used?

*September 9, 2014*

**algebra**

How many mL of a 60% acid solution must be mixed with a 20% acid solution to produce 200 mL of a 50% acid solution?

*September 9, 2014*

**algebra**

Adult tickets to a play cost $2.25 each and student tickets cost $1.75 each. Suppose there are twice as many student tickets sold as adult tickets. If the income from the play was $1,150, how many of each type of ticket were sold?

*September 9, 2014*

**Health question**

the answer was A

*May 8, 2014*

**physics**

Which of the following statements about a system in resonance is true A.The energy of the system is always increasing. B.The greater the damping the larger the amplitude of the oscillations C.The driving force is always in the direction of the velocity. D.The frequency of the ...

*April 16, 2014*

**physics**

A small object is attached to the end of a horizontal spring at position x = 0. It is the pulled to position x = A and released. In one full cycle of its motion, the total distance traveled by the object is...

*April 13, 2014*

**physics**

A block is attached to a horizontal spring and set in simple harmonic motion, as shown in the figure. At what point in the motion is the speed of the block at its maximum? The position of the block when the spring is relaxed is marked by x = 0, and the extremes of the block\&#...

*April 11, 2014*

**physics**

An object-–spring system undergoes simple harmonic motion. If the mass of the object is doubled, what will happen to the period of the motion?

*April 11, 2014*

**physics**

A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...

*April 11, 2014*

**physics**

Given that the small piston has a radius of 0.0330 meters^2 and the large piston has a radius of 4.00 meters^2. (a) What force will the large piston provide if the small piston is pushed down with a force of 17.0 N?. (b) If the small piston is slowly depressed a distance of y1...

*April 10, 2014*

**physics**

Bird bones have air pockets in them to reduce their weight–this also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone in air and in water and finds its mass is 43.0 g and its apparent ...

*April 10, 2014*

**physics**

A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...

*April 10, 2014*

**physics**

A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...

*April 10, 2014*

**science**

a 1.0 kg metal head of a geology hammer strikes a solid rock with a speed of 3.9 m/s. assuming all the energy was retained by the hammer head, how much will its temperature increase?

*April 8, 2014*

**science help pleasee**

I know it's a bit late. I could be wrong, but I'm fairly sure it's hydrogen bonding.

*March 19, 2014*

**Accounting**

I really need a lot of help learning how to understand and successfully fill out an income statement packet, ASAP please!!

*March 19, 2014*

**Business **

I really need help learning how to understand & fill out an income statement packet, ASAP!

*March 19, 2014*

**Global Studies**

I got it!!! 1) C 2) D 3) C

*March 13, 2014*

**Global Studies**

Help!!! Everyone is putting difereent answers

*March 13, 2014*

**Science 6th grade Earth's day and night ANSWERS**

I got a 100%....thanks so much!!!

*March 12, 2014*

**S.S redo**

THANK YOU SO MUCH!!! GOT A 100%

*March 12, 2014*

**Global studies**

No its not Jessica, I got a 1/3 bc I followed your answers

*March 12, 2014*

**Global Studies (Please help)**

Sarah was wrong.. 1) A 2) 500% 3) A

*March 10, 2014*

**statistics**

a large shipment of computer chips, of which 5% are actually defective, a quality control manager decides to test chips until he finds the first defective. What is the probability that the manager finds the first defective chip on the first test? in Homework Help

*March 7, 2014*

**Math**

if you are given two points and the slope formula of m=(y1-y2)/(x1-x2), does it matter which point is (x1, y1) and which point is (x2, y2)?

*February 26, 2014*

**English**

When writing an essay make sure that you do not use the word I a lot so that your paper keeps the attention of your audience.

*February 26, 2014*

**science --- pls check my work!!!**

1~ A 2~ C 4~D I got 100%😏

*February 8, 2014*

**HR LAW**

Hannah Bing was hired by Friendly Cab Company. The employee handbook stated that employeees would only be terminated for good cause. Hannah was fired and replaced with her supervisor's neice. Hannot cannot file a wrongful discharge lawsuit against Friendly catering company...

*February 6, 2014*

**math**

Tanya has 4 red marbles, 7 blue marbles, and 8 green marbles. Which expression can be used to find the percent of Tanya's marbles that are blue?

*January 29, 2014*

**math**

a 7.8m object is represented in a picture as being 1.5cm. what is the scale factoré

*January 8, 2014*

**science**

Please help!!!! Explain how mutations in DNA may affect the traits of an individual

*November 22, 2013*

**chemistry**

Is CO2 a product of an acid/base reaction?

*November 12, 2013*

**math**

Real world problem were you multiply 120and75

*November 5, 2013*

**Math Explanation**

6x6 tiles

*October 30, 2013*

**math**

Monday and Tuesday and Wednesday

*September 25, 2013*

**Math**

Multiply 1. (1.2z)(-4+2y) 2. (-2e - 3f +4)(-e) 3. (7v)(-7v-7x) 4. (-4x) (-7+3y) 5. (b)(-0.1a + 8b-0.7c) please help me, I have done these questions but im pretty sure my answers are wrong, so can someone do these or help me so i can understand how to do this, thanks :)

*June 9, 2013*

**Math**

Thank you so much :)

*June 2, 2013*

**Math**

Joe weighs 30 lbs less than twice ken's weight. If ken gains 10 pounds then together they would weigh 250 pounds. How much does each of them weigh? let x be ken's weight. my work: 2x - 30 = j x+ 10 + J = 250 and now im stuck, can someone show me how to find their ...

*June 2, 2013*

**Math**

im confused can you explain a little more cause i need a full equation and im really confused

*June 1, 2013*

**Math **

Joe weighs 30 lbs less than twice ken's weight. If ken gains 10 pounds then together they would weigh 250 pounds. How much does each of them weigh? let x be ken's weight. thanks

*June 1, 2013*

**Chemistry**

Describe the subatomic structure of the nucleus, including the structure of each nucleon. Draw a picture. Describe the forces that hold the nucleus together and draw them on your diagram. Explain how beta emission works.

*May 24, 2013*

**math**

Explain how to factor 5x^2 - 125.

*May 15, 2013*

**French**

How do you unscramble o'ceisoubellreld.

*April 23, 2013*

**math**

i need a little bit of help with some math homework very very bad!

*April 8, 2013*

**math sale taxes**

Eva is making copies of her choir's performance schedule. The total bill for the copies Eva made came to $48.00 plus 8% tax. How much tax did she pay?

*April 3, 2013*