Monday

January 16, 2017
Total # Posts: 3,280

**Chemistry**

5. How many grams of iron oxide can be produced from 2.50 g of oxygen reacting with iron, according to the following equation? 2 Fe (s) + 3 O2 (g) -->2 Fe2O3(s)

*February 16, 2016*

**Chemistry**

5. How many grams of iron oxide can be produced from 2.50 g of oxygen reacting with iron, according to the following equation? 2 Fe (s) + 3 O2 (g) -->2 Fe2O3(s)

*February 16, 2016*

**Algebra**

In a right triangle, one angle measures x degrees where sin x degrees= 5/8. What is the value of cos (90 degrees-x) ?

*February 14, 2016*

**physics**

Given that A= 4.00i(hat)+ 10.0j(hat)and B = 3i(hat)-5.00j(hat), find the magnitude and directions(i.e., angle with respect to the +x axis) of C= A+B magnitude = 8.6 I cant find out how to find the angle

*February 10, 2016*

**Math**

There are 5 chairs in a row, and three people. In how many ways c an you place the people on the chairs? (each person must occupy exactly one chair, so that two chairs will remain free).

*February 4, 2016*

**math**

The salary scale in three school districts are as follows, for a teacher with a master’s degree: District P: $30,000 plus $1500 for each year of experience District Q: $30,000 plus $1750 for each year of experience District R: $28,000 plus $1750 for each year of ...

*February 1, 2016*

**Math**

In which step is the error? Step 1: Let x = 1 and y = 1. Step 2: By substitution xy = y^2. Step 3: Multiplying both sides by -1, -xy= -y^2. Step 4: Adding x^2 to both sides, x^2-xy=x^2-y^2. Step 5: Factoring, x(x-y)=(x+y)(x-y). Step 6: Dividing both sides by x-y, x=x+y. Step 7...

*February 1, 2016*

**physics**

A blue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.2 m/s2. A green car arrives at the position of the stop-light 7.5 s after the light had turned green. What is the slowest constant speed which the green car can ...

*January 31, 2016*

**Math**

@Ms.Sue please help

*January 29, 2016*

**Math**

The ramp shown below is used to move crates of fruit to loading docks of different heights. When the horizontal distance AB is 12 meters, the height of the loading dock, BC, is 4 meters. What is the height of the loading dock DE? A. 12m B. 8m C. 9m D. 15m My answer is 9 is ...

*January 29, 2016*

**Science**

When you turn on a battery powered flashlight you transform... 1) heat into light chemical energy 2) chemical energy into electrical energy and light 3)heat into chemical energy and light 4) electrical energy and light energy into chemical energy

*January 28, 2016*

**Chemistry**

Write the equation for the dissolution of NH4NO3 in water. If 4.98 mol of NH4NO3 are dissolved, how many total moles of ions are produced?

*January 26, 2016*

**math**

the supplement of an angle is 20 degrees less than 3 times its complement. find the ratio of the supplement to the complement.

*January 23, 2016*

**Social Studies**

geariga please check

*January 22, 2016*

**Social Studies**

Which of the following state program areas consumes the largest part of the executive budget? (1 point) human services education *** natural resources transportation 2. Which state department is responsible for mental health-related issues and welfare? (1 point) human services...

*January 22, 2016*

**Chemistry**

Would there be any effect on the amount of precipitate in the experiment if tap water containing calcium ions is used instead of deionized water to dissolve the reactants. Assume that Na2CO3 is present in the excess.

*January 18, 2016*

**Math**

3) B 4) C i literally just finished this lesson lol

*January 14, 2016*

**check my english pleaseee**

1.)the storm *remains* a threat to the costal village a.)action verb b.)linking verb** c.)direct object d.)indirect object. 2.)which of these is a direct characterization of ted from " my brothers keeper " a.)im your kids brother five years younger than you are and ...

*January 8, 2016*

**Maths**

How do you factorise 2x^2 - x - 1

*January 7, 2016*

**Math**

please help!! which number is the solution of x/4=-5? a. 20 b. 1.25 c. -1.25 d. -20

*January 5, 2016*

**math**

where Amanda lives the sales tax is 7%. Amanda paid $35 in sales tax on a new stereo. what was the price of the stereo?

*January 4, 2016*

**Math**

are these answers correct. 1. c 2. a 3. d 4. b 5. d 6. b 7. b 8. c 9. d 10. b 11. c 12. d 13. a 14. d

*January 4, 2016*

**Math**

3(y+2) for y = 3 a. 21 b. 18 c. 15 d. 12 simplify 3+6y-2y+4 a. 4y+7 b. 8y+7 c. 6x-6 d. 9x-4 simplify 2(3x-2)+3x a. 9x-6 b. 6x-4 c. 6x-6 d. 9x-4 which number is the solution of x/4=-5? a. 20 b. 1.25 c. -1.25 d. -20 what is the solution to 12x=240? a. 20 b. 1.25 c. -1.25 d. -20 ...

*January 4, 2016*

**Math**

3(y+2) for y = 3

*January 4, 2016*

**Math / Fractions**

it's 8 because if you skip count by 2 or 4 you say "8"

*January 2, 2016*

**Physics**

Imagine a landing craft approaching the surface of the moon of a distant planet. If the engine provides an upward force (thrust) of 2890 N, the craft descends at constant speed; if the engine provides only 2200 N, the craft accelerates downward at 0.36 m/s2.

*January 2, 2016*

**Math**

To pass a course with a C grade, a student must have an average of 70 or greater. A students grades on three tests are 63, 76, 67. Find what score the student must get on the next test to get a C average or better

*December 14, 2015*

**Math**

Two ocean beaches are being affected by erosion. The table shows the width, in feet, of each beach at high tide measured where 1995 is represented by year 0. Western beach width Dunes beach Year number (in feet) width (in feet) 0 100 20 5 90 45 10 80 70 11 78 75 12 76 80 15 70...

*December 10, 2015*

**Social Studies**

oops sorry, the question is how would voters most likely react if political leaders raised taxes by 50% ?

*November 24, 2015*

**Social Studies**

A. they would not make any changes in their behavior. B. They would demand more public goods and services. C. They would stop voting in elections. D. They would not re-elect the leaders. i think A.

*November 24, 2015*

**Social studies (check please!)**

NVM i think its 1, check plzs

*November 24, 2015*

**Social studies (check please!)**

Which of these goods or services is paid for with federal taxes 1 community roads 2 military bases 3 public universities 3 police protection 3 Is correct

*November 24, 2015*

**Social Studies**

XYZ Gaming Inc. Wants to invest in some new goods to raise it's overall productivity. Which of these would be the best choice? Bigger desks for workers -- Faster Internet Service -- (Correct!) -- A new lunchroom -- Health training for employees --

*November 24, 2015*

**Social Studys**

ms sue

*November 24, 2015*

**Science**

The man lifted the 15 pound weight 2 feet above his head. How much work was done?

*November 22, 2015*

**math**

a bakery sells bagels for $0.85 each an muffins for $1.10 each the bakery hopes to earn $400 each day from these sales. Write an equation that represents the total amount the bakery would like to earn selling bagels and muffins each day. (sorry I have no idea how to do this...

*November 19, 2015*

**physics**

A 48-kg box is being pushed a distance of 7.5 m across the floor by a force Upper POverscript right-arrow EndScripts whose magnitude is 185 N. The force Upper POverscript right-arrow EndScripts is parallel to the displacement of the box. The coefficient of ...

*November 18, 2015*

**Physics**

Starting with an initial speed of 3.86 m/s at a height of 0.480 m, a 1.78-kg ball swings downward and strikes a 4.75-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.78-kg ball just before ...

*November 17, 2015*

**Physics**

The moon is a satellite that orbits the earth at a radius of 3.85 × 108 m. The mass of the earth is 5.98 × 1024 kg. What is the orbital speed of the moon?

*November 12, 2015*

**Science**

How does the direction of the electric current, moving across a battery powered device, differ from the direction of travel in the AC current sent to homes and businesses

*November 12, 2015*

**Science**

Thank You

*November 12, 2015*

**Science**

Batteries are made of two metals with different electron affinities. What does the phrase “electron affinity” mean and how does this affinity affect the voltage of the battery

*November 12, 2015*

**Physics**

Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 36.0 km/s and 50.6 km/s. The slower planet's orbital period is 7.78 years. (a) What is the mass of the star? (b) What ...

*November 8, 2015*

**Physics**

A "swing" ride at a carnival consists of chairs that are swung in a circle by 11.5 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 204 kg. (a) Determine the tension in the cable attached to ...

*November 8, 2015*

**Math**

An art teacher has a box of pencils. 1/10 are green, 1/2 are blue, 1/4 are orange, and the remaining 45 are red. How many pencils are orange?

*November 2, 2015*

**English**

Please check my answers. Which of the following sentences is punctuated correctly ? On January 1, 2000, many people thought that the new millennium would bring the end of the world,but it didn't ******** On January 1 2000, many people thought that the new millennium would ...

*October 28, 2015*

**chem**

X would be too high because the product would weigh more since it wouldn't be completely dried.

*October 28, 2015*

**Physics**

A person is trying to judge whether a picture (mass = 2.37 kg) is properly positioned by temporarily pressing it against a wall. The pressing force is perpendicular to the wall. The coefficient of static friction between the picture and the wall is 0.760. What is the minimum ...

*October 22, 2015*

**Physics**

A rocket blasts off from rest and attains a speed of 53.8 m/s in 17.4 s. An astronaut has a mass of 67.2 kg. What is the astronaut's apparent weight during takeoff?

*October 22, 2015*

**Physics- PLEASE HELP!!**

Add together these vectors: V1= 60 Newtons at 45 degrees N of W; V2= 5Newtons at 30 degrees S of E Is it 62.25N@40.50 S of E??

*October 21, 2015*

**Quick english check**

Is 1 ponderous? Is 4 homogenous? Is 9 wary? Is 10 alloyed?

*October 21, 2015*

**Quick physics check**

Add together these vectors: V1= 60 Newtons at 45 degrees N of W; V2= 5Newtons at 30 degrees S of E Is it 62.25N@40.50 S of E??

*October 21, 2015*

**Physics help**

A plane flies 230 mph at 60 degrees north of west for 2.5 hours. Answer the following questions. A. How far did it travel total? B. How far west did it go? C. How far north did it go? D. How fast did it go west? I don't know how to do this problem :(

*October 20, 2015*

**Statistics**

The second question is 0.754 because of this equation: (10C5)= (0.5^5)(0.5)^5 = 0.246 P(E')= 1-P(E) = 1-0.246 = 0.754

*October 19, 2015*

**Math**

Translate two thirds of the sum of r and 9 plus the product of 8and s

*October 12, 2015*

**College Algebra**

The monthly cost in dollars from producing x units of an item is given by the cost function C(x)=2x^2-160x+18400. How many units will result in the minimum cost? I do not know how to start this problem. Thank you for your help!

*October 12, 2015*

**Physics**

A 45 kg girl is sitting on one end of a see-saw, 0.6 m away from the the pivot pt. How far away form the pivot pt must a 60 kg boy sit on the other side in order for the see saw o be balanced?

*October 11, 2015*

**Physics**

a uniform meter stick is at rotational equilibrium when 220 g is suspended at 5 com, 120 g is suspended at 90, and the support stand is placed at the 40 cm mark what is the mass of the meter stick?

*October 11, 2015*

**HELP**

M = 2497

*October 9, 2015*

**Conversions?**

1. 41.06 km 2. -30

*October 9, 2015*

**Math**

Change the function below into standard form (y = a cos[b(x-h)]+k) then give the vertical shift. y = (cos[2x-π])/3 is this right: y = 1/3 cos[2(x-π/2)]+1/3 vertical shift: 1/3 up

*October 9, 2015*

**Social Studies**

I got 8/8!! 1 is D

*October 9, 2015*

**Social Studies**

Okay so is 1. D?

*October 9, 2015*

**Social Studies**

Is 3. C and 6. A and 1. A?

*October 9, 2015*

**Social Studies**

1. What do colonialism and imperialism both require? A. one country giving money to another B. 2 countries sharing resources** C. 2 countries working together D. one country ruling another country 2. What did West Africans trade to North Africans in exchange for salt? A. ...

*October 9, 2015*

**math (please)**

There is a 60% that your math teacher will give a pop quiz tonight and, due to the fact that you have a soccer game, there is an 85% chance you will not be able to do your math homework. You decide that you will do the homework if the probability of there being a pop quiz and ...

*October 8, 2015*

**Math**

or 2 could be D?? and 1 could be C?? anyone?

*October 8, 2015*

**Math (Please Help)**

..

*October 8, 2015*

**Math**

There is a 60% that your math teacher will give a pop quiz tonight and, due to the fact that you have a soccer game, there is an 85% chance you will not be able to do your math homework. You decide that you will do the homework if the probability of there being a pop quiz and ...

*October 8, 2015*

**Physics**

As an aid in working this problem, consult Interactive Solution 3.62. A ferryboat is traveling in a direction 32.0 ° north of east with a speed of 5.38 m/s relative to the water. A passenger is walking with a velocity of 1.50 m/s due east relative to the boat. What is (a) ...

*October 5, 2015*

**Physics**

In a marathon race Chad is out in front, running due north at a speed of 3.98 m/s. John is 95 m behind him, running due north at a speed of 4.52 m/s. How long does it take for John to pass Chad?

*October 5, 2015*

**Physics**

An airplane with a speed of 82.2 m/s is climbing upward at an angle of 71.6 ° with respect to the horizontal. When the plane's altitude is 772 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...

*October 5, 2015*

**physics**

A volleyball is spiked so that it has an initial velocity of 19.9 m/s directed downward at an angle of 55.8 ° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

*October 5, 2015*

**Physics**

A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.890 m/s at an angle of 36.0° above the table, and it lands on the magazine 0.0660 s after leaving the table. Ignore air resistance. How thick is the magazine? ...

*October 4, 2015*

**Physics**

A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 660 m/s. The gun is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.027 m below the center. What is the horizontal distance between the end of the rifle...

*October 4, 2015*

**Physics**

A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.4 m/s and the tension in the rope is T = 15.5 N. A peg is placed 4/5 of the way down the pendulum’...

*October 4, 2015*

**MS SUE PLEASE HELP LANGUAGE ARTS**

I put C and i got it right YAYY

*October 2, 2015*

**MS SUE PLEASE HELP LANGUAGE ARTS**

:((

*October 2, 2015*

**WRITEACHER??CAN YOU HELP**

PLEASEE

*October 2, 2015*

**MS SUE**

MS SUE???

*October 2, 2015*

**MS SUE PLEASE HELP LANGUAGE ARTS**

I think it might be B

*October 2, 2015*

**MS SUE PLEASE HELP LANGUAGE ARTS**

another person had this same question but you did not answer and I'm confused

*October 2, 2015*

**MS SUE PLEASE HELP LANGUAGE ARTS**

Since “Harriet Tubman” is in the narrative essay genre, which of the following would be most suitable to add at the end of the piece? A. a summary of the obstacles Harriet endured B. a flashback to Harriet in her childhood C. a scene of Harriet as an elderly woman D...

*October 2, 2015*

**Math- Please help**

I'm in desperate need of help on how to do these 4 problems. Write the function g(x) with the indicated transformations. 1. f(x)=x; translated right 3 units 2. f(x)=x^2; vertical stretch by 5, translated down 3 units and reflected across the x-axis 3 f(x)=|x|; vertical ...

*September 27, 2015*

**Math**

bus A stops every 12 minuets Bus B stops every 9 minuets on the same circuit they stop at the same bus stop at 9:15 am when is the next time this will happen ??

*September 27, 2015*

**Quick Algebra Help**

write the sentence as an absolute value inequality. I have no clue how to do this! 1 a number less than 4 units from 0 2. a number is more than 11 units from 8 3. half a number is at least 2 units from 20

*September 24, 2015*

**Quick Algebra Help**

The rules for a book report say that the report should have 300 words with an absolute value deviation of at most 20 words. Write and solve an absolute value inequality that represents the acceptable number of words.Please help me!

*September 24, 2015*

**Quick algebra help**

What would this look like if a write a function g whose graph represents the indicated transformation of the graph of f? 1. f(x)= |x| translation of 5 units left and 2 units up 2. f(x)=x^2; reflection in the c axis and translation 8 units left

*September 23, 2015*

**physics**

A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 6.27 m/s. The car is a distance d away. The bear is 32.1 m behind the tourist and running at 9.06 m/s. The tourist reaches the car safely. What is the maximum possible value for d?

*September 20, 2015*

**Physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.34 m. The stones are thrown with the same speed of 9.35 m/s. Find the location (above the base of the ...

*September 20, 2015*

**Math**

What are the steps, though?

*September 17, 2015*

**Physics 111**

A boat is crossing a river. The velocity of the boat relative to the water is 4.0 m/s directed perpendicular to the river's current. The velocity of the current relative to the shore is 2.0 m/s. How long will it take for the boat to cross the river?

*September 13, 2015*

**Physics**

The gravitational force between two masses is 500N. What is the gravitational force if the masses are doubled and distance between them is likewise doubled? What formula/s should I use?

*September 13, 2015*

**Physics**

A motor cyclist travelling at 12m/s decelerates at 3m/s square a) how long does he take to come to a rest b) how far does he travel in coming to rest

*September 10, 2015*

**AP Chemistry**

Please show me how to do this step by step I would appreciate it We add excess Na2CrO4 solution to 42.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.520 grams. What is the ...

*September 10, 2015*

**Chemistry**

Excuse you DrBob222 first of all no one wasted your time secondly you didn't even explain it to me and lastly I don't think I reposted it and if i did it was a mistake. Good day.

*September 9, 2015*

**Chemistry**

nevermind I figured it out!

*September 9, 2015*

**Chemistry**

please show me step by step how to do this so i can figure out the rest We add excess Na2CrO4 solution to 42.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.520 grams. What ...

*September 9, 2015*

**math**

Please help. mr trocki is the groundskeeper for a vacation resort. he has programmed the sprinkler system to run at night in three different zones. The sprinklers turn on at midnight and run until 7am. the fist zone runs every 90 minutes, the second zone turns on every 40 ...

*September 2, 2015*

**Math**

mr trocki is the groundskeeper for a vacation resort. he has programmed the sprinkler system to run at night in three different zones. The sprinklers turn on at midnight and run until 7am. the fist zone runs every 90 minutes, the second zone turns on every 40 minutes, and the ...

*September 2, 2015*