Thursday

January 19, 2017
Total # Posts: 3,291

**Physical Science**

Calcium Carbonate combines with Hydrochloric acid to produce Calcium chloride and water and carbon dioxide. I have the skeletal equation of _Ca(CO3)+_HCl>_CaCl2+_H2O+_CO2 is that equation right? if so, how to I balance it?

*February 18, 2015*

**linear algebra**

If possible, find an example of actual numbers c1, c2, and c3, not all zero, so that the following is true. c1[3,3,−1] + c2[1,2,−3] + c3[−11,−13,9] = [0,0,0]

*February 12, 2015*

**linear algebra**

For what values of a and b are the vectors [ a − b −3] and [7 a + b] equal?

*February 11, 2015*

**english**

the answer is influence, i just took the test.

*February 11, 2015*

**physics**

Ummm dude....same idea :) didn;t know you were doing this earlier today.

*February 9, 2015*

**linear algebra**

If possible, solve the following linear systems by Cramer's rule. 2x1 + 4x2 + 6x3 = 14 x1 + 2x3 = 0 2x1 + 3x2 − x3 = 30

*February 9, 2015*

**Maths**

A bag contains 8 coins of £1, 7 coins of 50p, 4 coins of 25p and 3 coins of 10p. How many different ways can we take 6 coins from the bag?

*February 5, 2015*

**math**

Which of the following homogeneous systems have a nontrivial solution? 5x+ y + 5z =0 −2x + 2y− 4z = 0 4x− 3y + 6z = 0 can someone please explain how you know

*February 4, 2015*

**linear algebra**

Find the inverse of A = [−5 2 2; −3 1 1; −9 3 4]

*February 3, 2015*

**Organic chemistry**

What kind of reaction is occurring between potassium permanganate and cyclohexene? (I.e. Combination, double displacement, etc.

*January 29, 2015*

**S.S. Check please**

My bad 2 is C I believe! and Thank you

*January 29, 2015*

**S.S. Check please**

2. Why were Native Americans forced to leave their lands during the 1830s? a.) settlers wanted to settle the land b.) U.S. citizens settled the land first c.) the Supreme Court ordered their removal d.) their new lands were better for farming. ****** 4. How did President ...

*January 29, 2015*

**Language Arts**

Based on context clues, what is the meaning of deemed in the following sentence? The teacher deemed it necessary that all students turn in their reports before vacation, or they would receive half credit. (1 point) • voted • ruled (this one) • decided • ...

*January 27, 2015*

**Language Arts**

Which word in the following sentence is an adjective? Jack trudged home through deep snow. (1 point) • trudged (this one) • through • deep • home 7. Which of the following words is a synonym for beseeched in the following sentence? Nathan beseeched his ...

*January 27, 2015*

**Language Arts**

OH MY GOODNESS is it Brightly??

*January 27, 2015*

**Language Arts**

Adverbs answer how when where or why right? sandy??

*January 27, 2015*

**Language Arts**

Which word in the following sentence is an adverb? Teresa smiled brightly as she and her younger brother looked for shiny shells on the sandy beach. • smiled (this one) • brightly • shiny • sandy What kind of word does the adverb in the previous question ...

*January 27, 2015*

**Art**

That question was a little messed up because right there in the paragraph you posted it also says it can reveal whats not visible to the eye Don't like this question and believe this is why it got asked so much! Everyone was confused!

*January 27, 2015*

**algebra. help!**

MATRICES What is the sum of [3/4 -2/-3]+[-5/3 -4/-2]? a. [-8/1 2/6] b. [-2/7 2/-1] c. [2/-7 6/5] d. [-2/7 -6/-5]** What is the difference of [3/4 -2/-3]-[2/7 -5/12] a. [-3/-1 3/7] b. [1/-3 3/-15] c. [-3/3 -3/15]** d. [-1/3 3/-15]

*January 26, 2015*

**algebra. help!**

Matrices. So what is it?

*January 26, 2015*

**algebra. help!**

I think it is B

*January 26, 2015*

**algebra. help!**

What is the sum of [3/4 -2/-3]+[-5/3 -4/-2]? a. [-8/1 2/6] b. [-2/7 2/-1] c. [2/-7 6/5] d. [-2/7 -6/-5]

*January 26, 2015*

**Art check please**

Yes ^ there all right I took the test and all those answers are right!!!

*January 23, 2015*

**math**

sharon completed her reading homework in 2/3 hour.she completed her science homework in 5/6 hour. how much longer did it take sharon to complete her science homework

*January 22, 2015*

**math**

The scale balanced when n+20=80 Suppose the left side becomes n+3 How can I change the right side so that n+3=____ is equivalent to n+20=80 How can I change the right side to get an equivalent equation my choices are A. Add blank to the right side B. Divide the right side by ...

*January 12, 2015*

**math**

A6.7%

*December 14, 2014*

**physics**

A particle of mass 0.2kg is found to stretch a certain spring by 5.0 cm. a. What is the force constant of the spring? b. By how much will a 1kg mass stretch the spring.

*December 9, 2014*

**Science**

A mass of .1539 kg. moves down a 5 meter ramp in 2 seconds. What is the velocity and the KE developed by the moving mass?

*December 3, 2014*

**Physics**

Two sounds have measured intensities of I1 = 110 W/m2 and I2 = 330.00 W/m2. By how many decibels is the level of sound 1 lower than that of sound 2? Answer in dB.

*December 1, 2014*

**math**

The area of a rectangular field is 96m2. The length of one side is 12m. The farmer needs to know its perimeter to work out how much fencing will be needed?

*December 1, 2014*

**American Government**

Does that help? That's all I have to find the answer!

*November 29, 2014*

**American Government**

The way Conspiracy Theory was explained "An unprovable belief that governments and specific policies or events (e.g., wars and assassinations) are controlled by unified, secret, evil elite. The way Plural Elitism was explained: "A view of American politics as being ...

*November 29, 2014*

**American Government**

Plus A, B, and C is not one of my options!

*November 29, 2014*

**American Government**

No because it for sure is not answer B.

*November 29, 2014*

**American Government**

A ______ might consider the compromises struck during the health care reform debate to be an example of elite interest groups each pursuing and achieving their separate sets of agendas? a) plural elitist b) fundamentalist c) conspiracy theorists d) Both A and C

*November 29, 2014*

**American Government**

A ______ might consider the compromises struck during the health care reform debate to be an example of lit interest groups each pursuing and achieving their separate sets of agendas? a) plural elitist b) fundamentalist c) conspiracy theorists d) Both A and C I was thinking it...

*November 29, 2014*

**physics**

When a 1.3kg mass was attached to a spring, the spring stretched 21cm from its equilibrium position. The mass spring system was then set into oscillatory motion by providing the mass with an initial velocity. Its oscillatory motion is then described by the following equation: ...

*November 27, 2014*

**English**

Thank you so much !

*November 25, 2014*

**English**

Hi. I was asked to watch a video about the civil rights movement. and state 3 big ideas and to explain why I made them my 3 big ideas I put Freedom Equality Justice and explained why .. Is that 3 ideas ? Next part they asked How would the story be different if Kurt Vonnegut ...

*November 25, 2014*

**Chemistry**

In 250 mL of a 0.35 M solution of NaOH, there are how many grams of NaOH?

*November 24, 2014*

**Chemistry**

The equilibrium constant for the reaction H2 + I2 --> 2HI, is 54 at 425 degrees C. If the equilibrium mixture contains 0.030 M HI and 0.015 M I2, calculate the equilibrium concentration of H2.

*November 24, 2014*

**physics**

19.6kcal

*November 24, 2014*

**Chemistry**

How many mL of a stock 2.50M HCl solution are required to prepare 25.0 mL of a 0.15M HCl solution?

*November 23, 2014*

**Chemistry**

A certain reaction has an equilibrium constant of 0.65. Calculate the constant for the reverse reaction.

*November 23, 2014*

**algebra. help!**

Find the slope of a line that passes through (-2,-3) and (1,1). a. 1/3 b. 1 c. 2 d. 4/3 For the equation -4y=8x, what is the constant of variation? a. -4 b. -2 c. 1 d. 2 Suppose y varies directly with x, and y=24 when x=8. What is the value of y when x=10 a. 10 b. 30 c. 80 d.240

*November 20, 2014*

**physical**

I'm so confused

*November 17, 2014*

**Chemistry**

Identify the intermolecular attractive force(s) that must be overcome to vaporize CH3Cl(l).

*November 15, 2014*

**organic biochemistry**

Calculate the number of moles of ZnCl2, in 100. mL of 0.600M solution.

*November 5, 2014*

**physics**

A 755 N diver drops from a board 10.0m above the water's surface.Find the diver's speed 5.00 m above the water's surface. Then find the diver's speedjust before striking the water.

*November 5, 2014*

**Science**

centarl nervous system human being brain nerve tissue neurons

*November 5, 2014*

**English**

Compare and contrast the topics and themes of writers from the Americas and European writers.

*November 5, 2014*

**english 10**

I need help with this question as well, I'm choosing prompt A.

*November 4, 2014*

**math**

An estimate for -66

*October 29, 2014*

**algebra. help!**

Thank you so much!

*October 27, 2014*

**algebra. help!**

I choose c

*October 27, 2014*

**algebra. help!**

Start from 110 feet away, a person on a bicycle rides towards a checkpoint and then passes it. The rider is travelling at a constant rate of 30 feet per second. The distance between the bicycle and the checkpoint is given by the equation d=|110-30t| at what times is the bike ...

*October 27, 2014*

**algebra. help!**

1. 3x+10≥4 a. x≥-2 b. x≤ 2 c. x≤-2 d. x≥ 2 ** 2. The tennis team is selling key chains as a fundraiser. If its goal is to raise at least $180, how many key chains must it sell at $2.25 each to meet that goal? Write and solve an inequality. a. 2....

*October 27, 2014*

**Physics**

Two hockey players traveling at 12 m/s (Player #1) and 19 m/s (Player #2) hit in a head-on collision. They grab onto each other to keep from falling and slide in the same direction Player #2 was traveling at a speed of 5 m/s. Player #1 has a mass of 100 kg. What is Player #2&#...

*October 21, 2014*

**Math**

Hi I really need help. I don't know even how to figure these two questions out so if you could help me, please. Is (–4, 10) a solution to the equation 10 – 5x = y? Explain your answer. Describe the pattern in the table using an equation. x|y 1|15 2|25 3|35 4|45 ...

*October 14, 2014*

**College Chemistry lab**

No. I'm doing the questions in my lab manual and this is all the information I have. The lab is spectroscopic analysis of spinach. Test tube 1 has 9ml of 2.0M HCl and 1 ml of .00050M FeCl3 and 10ml of KSCN. But question asks for the concentration of iron lll before the ...

*October 13, 2014*

**College Chemistry lab**

How do I Calculate the concentration of iron(lll) with absorbance measurement. Wavelength is 480nm, solution is 1 ml FeCl3 : 9ml HCl, absorption is .250A, concentration of stock FeCl3 solution is 0.00050M and stock HCl solution is 2.0M. I not sure how to use beer's law to ...

*October 13, 2014*

**Creative Title Help**

yo mama eats fish too so stop overfishing

*October 12, 2014*

**Physics**

In the system shown in the figure, suppose the block has a mass of 2.7kg , the spring has a force constant of 500N/m , and the coefficient of kinetic friction between the block and the floor is 0.18. Find the work done on the block by the spring and by friction as the block is...

*October 9, 2014*

**Science**

A,D,C,C. All right:)

*October 8, 2014*

**Algebra**

A rectangular region with one side against an existing building is to be fenced in. Assume that there is 150 ft of material available. Since one side is the building, you will use your material to construct 3 sides of the rectangle.

*October 7, 2014*

**math**

Need help! The problem is: draw all the possible rectangles with a perimeter of 26 centimeters and whole number lengths of sides for each rectangle label the lengths of two adjacent sides. Dot array homework sheet. Thanks!

*October 6, 2014*

**Chemistry**

8.78 L

*October 5, 2014*

**math**

A painter earns $15 per hour. What is the minimum number of hours he must work to earn at least $200? Write an inequality to represent this situation and solve. Show your work.

*October 5, 2014*

**history**

1.) describe the primary economic activity for each of the tree colonial regions: The new england colonies, the middle colonies , and the southern colonies. explain how the gephraphary of each region helped determine its economy (6 points) @mrs.sue please help

*October 3, 2014*

**social studies**

1.) contrast the up country and the low country. identifiy three diffrences between the two regions (6 points) 2.) describe the primary economic activity for each of the tree colonial regions: The new england colonies, the middle colonies , and the southern colonies. explain ...

*October 3, 2014*

**Social Studies**

1.)c 2.)a or d 3.)c 4.)a 5.)b 6.)d 7.)b 8.)a 9.)? 10.)c 11.)d 12.)b Thoes are my answeres

*October 3, 2014*

**Social Studies**

1. The leaders of the Virginia Company recruited more settlers and reorganized the colony. They allowed the new settlers to own land. Those settlers began to grow tobacco, a crop they learned about from the Indians. By 1612, Virginians were shipping tobacco to England, which ...

*October 3, 2014*

**Math**

or sir ._.

*October 2, 2014*

**Math**

yes ma'am

*October 2, 2014*

**Math**

between were erika is standing to the vertical distance from the kite is 75 meters. how high is the kite in meters a.)125 b.)100 c.)25 d.)15 My answer is c am i correct ?

*October 2, 2014*

**Science**

1.)When evaluation was first processed which of the following was used as evidence to suport the idea (1 point) a.)observations of nature**** b.)laboratory experiments c.)extensive fossil collections b.)genetic sequence 2.)a farmer sprays insecticide on his crops and notices ...

*October 2, 2014*

**science**

6. I got C 10. I got B 11. I got C

*October 1, 2014*

**math**

The area of a circle is found with the formula A =〖πr〗^2, where π represents 3.14. If a tile artist is placing tiles in a circular mosaic pattern and the area of the circle is 658 square feet, what is the approximate radius of the circle in feet? a.)10...

*October 1, 2014*

**History**

im not really sure about this oen and i have read over and over agin what was the direct result of the Stono rebellion? a.)the passage of the slave code b.) the defeat of govern William bull c.) the exicution of the leaders of the rebelion d.) the creation of laws punish thoes...

*September 30, 2014*

**History**

thank you ms.Sue i have one more question do mine helping me ?

*September 30, 2014*

**History**

1.) why did most slave owners not want slaves to be educated? wouldn't it be they feared education would lead to revolts ?

*September 30, 2014*

**Chemistry**

Find the mass (in g) of Carbon in 2.980 g Carbon dioxide.

*September 24, 2014*

**algebra 2**

I found out that question 2 is the same equation so it can't be solved but I still need help with question 1.

*September 24, 2014*

**algebra 2**

Solve the following systems of equations. If the system cannot be solved ,state that it cannot be solved and explain why. 1.3x+y=7 3x+y=10 2. 5x-2y=-24 -4y=-48-10x

*September 24, 2014*

**algebra. help!**

i say false for 1, and for number 2 a?

*September 24, 2014*

**algebra. help!**

Is 4x-3=19 true, false, or open? Which of the following is a solution to the equation 16=4x-4? a. -5 b. -4 c. 5 d. 16

*September 24, 2014*

**algebra. help!**

Yeah^?

*September 24, 2014*

**algebra. help!**

is -7+9=-9+7 true false or open

*September 24, 2014*

**English**

Yes thank you!

*September 24, 2014*

**English**

The 'White House' has been home to many animals as well as presidents. (1 point) common noun proper noun compound noun collective noun

*September 24, 2014*

**math**

the expression that is equivalent to -2(x - 7).

*September 23, 2014*

**algebra**

1.Find an equation of the line that passes through (4,3) and is parallel to the line 3x-y=7. 2. Find the equation of the line through (4,3) perpendicular to the line 3x+y=7. Please show work so I know how to do it

*September 23, 2014*

**physics**

A barge is hauled along a straight-line section of canal by two horses harnessed to tow ropes and walking along the tow paths on either side of the canal. Each horse pulls with a force of 403 N at an angle of 12.9° with the centerline of the canal. Find the sum of the two ...

*September 18, 2014*

**English**

1.Indirect characterization 2.subconscious 3.travelers saw pterodactyls, bats, and a Tyrannosaurus Rex.

*September 16, 2014*

**Algebra**

Determine the value or values of d that complete the square for the expression. (a) x^2 + dx +64 (b) x^2 + dx +49/4

*September 15, 2014*

**physics**

You stand at the edge of a cliff, holding a ball out over the edge. You give the ball an initial velocity of 7.00 m/s straight up, releasing the ball when it is 17.0 m above ground level (the level of the ground at the base of the cliff). Use g = 10.0 m/s2, and neglect air ...

*September 15, 2014*

**Science**

1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. Scientists use models of natural systems because they like to use art in science. ...

*September 15, 2014*

**Science Plase help check my answers**

Mrs Sue Please Help D:

*September 15, 2014*