Friday
July 29, 2016

Posts by Sierra

Total # Posts: 281

math
typo, i think it's just meant to say the sums of the equations
May 25, 2016

math
7x + 5 8x + 9 find the value of x so that both the sum of the equations equal 180 when added together.
May 25, 2016

Algebra
I lined up all of my pet snakes. The two pythons are 6 feet each. I also have three corn snakes that are all the same length. Altogether, my snakes total 21 feet. A. How long is one of the corn snakes? B.Write an equation that models this situation. Thank you teachers so much ...
April 26, 2016

math
write an algebraic or numeric expression for the following:Take away 30 from j
April 25, 2016

Algebra
Thats what Im confused about I have to explain WHY the above equation is incorrect, in complete sentences. Before, I asked why this is wrong, the question states Nelson says the equation to find how many cookies are in each bag is 4*c=36. Nelson is wrong. Now I have to explain...
April 25, 2016

Algebra
I have 6 bags with the same number of cookies. Altogether I have 36 cookies.The equation to find out how many cookies are in each bag is 4*c=36. Why is this wrong?
April 25, 2016

Chemistry
Radium-223 has a half-life of 11.4 days. Approximately how long would it take for the activity of a sample of 223Ra to decrease to 2.00 % of its initial value?
April 7, 2016

Art
Thanks
April 7, 2016

Art
what value is most likely encouraged when citizens look at the rising eagle on the unit state dollar bill? Wisdom Patriotism Endurance Creativity I think either wisdom or patriotism
April 7, 2016

Chemistry
what volume of 1.00M ca(oh)2 is needed to neutralize 250.0mL of 0.100M HCL?
April 6, 2016

Chemistry
What volume of 1.00M ca(oh)2 is needed to neutralize 250.0mL of 0.100M HCL?
April 5, 2016

Physics
you strike a huge spring at a speed of 30m/s while strapped in a steel cage. When you hit the spring with combined mass of 320kg it is compressed 9.0m. A) What is the spring constant of the spring? B) How long are you in contact with the spring before it bounces off in the ...
February 22, 2016

Physics
So you chose to use a solid sphere and you give it a speed of 5.9m/s on a flat horizontal surface which is the speed it has when it reaches a 22degree incline. A) How far along the incline will it go?
February 22, 2016

science
convert your answer from 3 to meters per second.
February 11, 2016

Language Arts
Thanks
January 15, 2016

Language Arts
Choose the meaning that best matches the word in capitals: The president of the large company felt as if he had reached the PINNACLE of his career. A. lowest point B. pointed or towering formation C. highest point of achievement** D. rise toward success or fame I think it is C
January 15, 2016

Health
I think it's c
December 15, 2015

math
The property taxes on a business office were $3000. What was the tax rate if the business office was valued at $200,000?
December 11, 2015

Math
First year students at a particular college must take one English class, one class in mathematics, a first year seminar, and and elective. There are 2 English class to choose from, 3 mathematicss classes, 5 electives, and everyone takes the same first year seminar. Represent ...
October 22, 2015

english
in line 16of "The Nymph's reply to the shepherd" in what ways does the speaker's word choice reveal a striking balance of opposite to illustrate the theme of the harmful effects of time?
September 16, 2015

AP Chemistry
An ore contains Fe3O4 and no other iron. The iron in a 39.3-gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 10.6 g. What was the mass of Fe3O4 in the sample of ore? Answer in units of g
September 7, 2015

Math 7
Thanks
May 25, 2015

Math 7
A photo studio offers different sized prints of the same subject. The original print measures 8 inches by 10 inches. A printer enlarges the orginal the orginal by a scale factor of 1.5, and then enlarges the second image by a scale factor of 3. What are the dimensions of the ...
May 25, 2015

science
@mariana do you know the rest of the answers ?
April 29, 2015

Math
Each human hand has 27 bones. There are 6 more bones in the fingers than in the wrist. There are 3 fewer bones in the palm than in the wrist. How many bones are in each part of the wrist?
April 26, 2015

History
I am having a hard time with this question and where to look for the answer. How might the cultures of Latin America be different if the spanish and portugese never arrived? Also what kind of culture do you think would dominate today?thanks
April 15, 2015

calculus
The operating cost, C, in dollars per hour, for an airplane cruising at a height of h metres and an air speed of 200km/h is given by: C = 4000 + h/15 + 15000000/h for the domain 1000 ≤ h ≤ 20000. Determine the height at which the operating cost is at a minimum, and...
March 31, 2015

math help
my bad, the 1.5 should be positive! so y=1.5 and x=0.5
March 31, 2015

math help
You have to isolate one variable in the first equation first because its easier, then substitute it into the second one: x=2-y Now plug this in for x in the second equation: 3(2-y)^2+4(2-y)y+y^2=6 Now solve for y, then plug your answer back into: x=2-y 3(2-y)(2-y)+8y-4y^2+y^2=...
March 31, 2015

Earth Space Science
the horizontal distance between a crest to the next trough of an ocean wave is 5 meters. what is the wavelength of the ocean wave? A)2 meters B)5 meters C)10 meters D)20 meters I think its 10 meters but im not so sure, I would like to make sure.
March 28, 2015

Science
which of these statements provides evidence to the fact that oceans influence climate by transporting water from one place to another? A)warm ocean water off the east coast of Florida affects the climate of Europe. B)warm ocean water off the east coast of Florida affects the ...
March 28, 2015

Science
Salinity of the ocean A)is generally very low B)changes with climate C)decreases with increase in temperature D)increases where a river meets the ocean I think its A but I'm not sure I just want to make sure.
March 27, 2015

English
Thank you
March 27, 2015

English
Hello, can you check with me to see if this answer is correct to this question. What does scrooge mean by these lines in a Christmas carol Act two scene four? Spirit this is a fearful place, in leaving it, I shall not leave its, lesson, Trust me let us go. Answers are; I am ...
March 27, 2015

Statistics
A student guesses blindly on a 20-question multiple choice test. If each question has 4 answer choices (only one of which is correct), what is the probability that the student will answer exactly 10 questions correctly?
February 20, 2015

physics
A horizontal force of 150 N is used to push a 45.0-kg packing crate a distance of 5.75 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150-N force (b) the coefficient of kinetic friction between the ...
February 17, 2015

algebra
A school has a classroom with a length eight feet less than twice the width. If a group of parents purchased 400 square feet of carpet for the room, what is the approximate length of the room? L=2W-8 L*W=400 (2W-8)W=400 2w^2-8w=400
February 10, 2015

7th grade math
Thanks
February 4, 2015

7th grade math
The sum of an integer and the next greater integer is at the most 13. Write an inequality to find the lesser integer and solve for the lesser integer. My answer n+n+1 <_ 13 n<_6
February 4, 2015

College Algebra
Allison drove home at 65 mph, but her brother Austin, who left at the same time, could drive at only 41 mph. When Allison arrived, Austin still had 144 miles to go. How far did Allison drive?
January 29, 2015

Art
Did you get this right.?
January 29, 2015

Math
Thanks for breaking it down.
January 14, 2015

Math
A true crab has 4 fewer than twice the number of legs that a hermit crab has. The hermit crab has 6 legs. How many legs does the true crab have? I put for the equation 4c =6 *2 I am confused
January 14, 2015

Math
Thanks, I got 160
January 14, 2015

Math
160
January 14, 2015

Math
An annual pass covering entrance fees to more than 2000 national parks cost $80. If the total income from the annual passes is $12,800 in one month. Write the equation and solve it. For my equation I put 12800p=80
January 14, 2015

Math
Thanks a lot
January 13, 2015

Math
Is the answer x= 3500
January 13, 2015

Math
1400= 2/5x X= 7000 I took 1400 times 5
January 13, 2015

Math
Thanks a lot
January 12, 2015

Math
Which expression represents the difference of (3y+2)-(y-1)? I put 2y+ 3 for my answer.
January 12, 2015

Math
Thanks
January 12, 2015

7th grade math honors
Thanks a lot
January 12, 2015

Chemistry
I got 5.6 Thanks
January 11, 2015

Chemistry
I really don't understand this problem? Is there a simpler way to do this? Thanks
January 11, 2015

Chemistry
find the mass in grams of 1.40x10^23 molecules of n2
January 11, 2015

Chemistry
Thanks
January 10, 2015

Chemistry
72 is my answer
January 10, 2015

Chemistry
What is the mass of 1.00 mol of sodium hydrogen carbonate?
January 10, 2015

Chemistry
6.25 percent is my answer Thanks a lot for helping me
January 10, 2015

Chemistry
What is the percent by mass of hydrogen in aspirin C2H8O4?
January 10, 2015

chemistry
That's very helpful! Thank you!
November 24, 2014

chemistry
I just need a definitive answer because I've searched everywhere and it's made me second guess my original answer. How many valence electrons does copper have? I thought it was one but now I'm unsure. I know it's electron configuration is [Ar]4s1 3d10, so that...
November 24, 2014

chemistry
Because I had to convert kJ to J So I did: 1312200/2(6.022x10^23) 6.626x10^-34(3x10^8)/ans and then that answerx 10^9 to convert to nm Where did I go wrong because that answer wasn't correct =(
November 18, 2014

chemistry
Ok that's what I thought! So my answer should be 182.45 nm, yes?
November 18, 2014

chemistry
Wait, what's planck's equation??
November 18, 2014

chemistry
Experimentally the ionization energy of hydrogen is 1312.2 kJ / mol. What would be the wavelength (nm) of a photon with enough energy to ionize one atom of hydrogen? They give the equation E=hcR but those are all known constant values and none include mols so I'm very ...
November 18, 2014

History
What are some aspects of the modern American political party system that began during the Jackson era? A.beginnings of political action committees and fundraising B.widespread campaigns for the popular vote, including fliers, slogans, and songs C.of campaign tours and town ...
November 10, 2014

chemistry
Hemoglobin is the oxygen carrying molecule of red bloods and contains 4 atoms of iron per molecule of hemoglobin. A sample of hemoglobin weighing 13.4 g contains 45.6 mg iron. What is the molecular mass of hemoglobin? I'm unsure of where to begin with this problem. I know ...
October 24, 2014

COLLEGE PHYSICS
7500J=1/2(M2V^2) +1/2(1.5M2)(V^2) 7500J=1/2 (M2V^2+1.5M2V^2) 15000=M2V^2+1.5M2V^2 15000= X+1.5X 15000=X(2.5) 6000=X 6000 = X = M2V^2 1/2(6000) = KE 3000 = KE TOTAL PE (7500J) - KElargerobject(3000) = 4500J (KE smaller object)
October 22, 2014

COLLEGE PHYSICS
7500J = KE1 + KE2
October 22, 2014

physics
A circular curve of highway is designed for traffic moving at 93 km/h. Assume the traffic consists of cars without negative lift. (a) If the radius of the curve is 110 m, what is the correct angle of banking of the road? (b) If the curve were not banked, what would be the ...
October 7, 2014

religion
who do members of the Jesuit Volunteer Corps work for?I need help,been stuck on this question for,like,15 minutes,I've been searching the internet for 20 minutes.
September 28, 2014

History of Middle Ages
The answer is C not A
September 22, 2014

chemistry
In 26. The reaction is Br- + H3O+ = HBr + H2O. Not Br- + H3O+ = HBr = H2O! Im sorry!
September 16, 2014

chemistry
25. Which of the two reactions, A or B is a neutralization reaction? Explain why. A. HBr + H2O = Br- = H3O+ B. HClO + NaOH = NaClO + H2O 26. A. Look at the reaction again. when this reaction is reversed. Br- + H3O+ = HBr = H2O what substance is the acid, what is the base. B. ...
September 16, 2014

chemistry
Please identify the acid and the base in this equation. HClO + NaOH = NaClO + H2O Thank you!
September 15, 2014

History
The third one would be Serbia.
September 15, 2014

Chem
41. How much heat energy must you use to raise the temperature of 100 grams of water from 60C to 70C. Show your calculations. 42. You have a pot of 100C liquid water. If you add heat to the water, will the temperature start to raise at once? why or why not. Thank you for your ...
September 15, 2014

Social Studies
The answer is B because, she is creating and selling something herself.
September 15, 2014

Chemistry: Please Help!!
39. Explain why sweating cools you down in terms of molecular kinetic energy. 40. You take a pizza out of the oven and let it cool briefly. When you bite into it, the crust is not too hot but the cheese burns your mouth. Explain why this happens in terms of specific heat ...
September 15, 2014

Chemistry: Please Help!!
37. Lake Michigan is a very large, very deep body of water, located in a region of the United States that gets quite cold in winter. On the coldest day of last year, what was the temperature at the bottom of the lake. Explain your answer in terms of density of water. 38. ...
September 15, 2014

Chemistry
B. Could non-polar nitrogen molecules and polar water molecules form bonds with one another? if so, what kind? C. Given your answer to B above, do you think that there is a great deal of N2 dissolved in the oceans, a small amount, or none at all?
September 15, 2014

Earth Science
D. Epicenter.
September 15, 2014

math
3/4 of a gallon is 6/7 of the amount originally in the container. how much was in container originally
April 20, 2014

social studies
where did major general William Rufus Shafter stay while he controlled the war? PLEASE HELP!!!!!!
April 7, 2014

Math
In triangle ABC, m<A=71, m<C=41, and BC=96. To the nearest tenth, what is AB?
March 27, 2014

Math
Write a rule in function notation to describe transformation that is a reflection across the x-axis. A. Ry-x(X,Y) B. Rx-0(X,Y) C. Rx-y(X,Y) D. Ry-0(X,Y)
March 27, 2014

Geometry
The vertices of a triangle are P(-3,8), Q(-6, -4), and R (1, 1). Name the vertices of R (smaller letters)y-0 (triangle PQR). A. P'(-3, 8), Q'(-6,-4), R'(1,1) B. P'(-3,-8), Q'(-6,4), R'(1,-1) C. P'(3,-8), Q'(6,4), R'(-1,-1) D. P' (3,8), Q...
March 26, 2014

Algebra
6/z-3=8/5 help please.
March 21, 2014

Math
Line LM is the mid-segment of rectangle ABCD. AB=x+8, LM = 4x+3, and DC=243. What is the value of x?
March 11, 2014

Math
Line LM is the mid-segment of rectangle ABCD. AB=72 and DC=104. What is LM? A.176 b. 88 c.98 d.32
March 11, 2014

Math
In the rhombus, angle 1=15x, angle 2=x+y, and angle 3=30z. Find the value of each variable.
March 10, 2014

Math
Line DF bisects angle EDG. Find the value of x. Line EF has 9x+114. Line FO has 15x. angle FDG has 32 degrees.
March 10, 2014

Geometry
What is an equation in point-slope form for the line perpendicular to y=2x+13 that contains (8,-4)?
March 9, 2014

Social Studies 10
"Was the conflict over the Red River Settlement inevitable? Provide reasons for your answer." <- exact
March 6, 2014

Math
Can you please check my answers? Thank you! 18 out of 25 people love chocolate what percentage of people do not love chocolate? I got 28% 15% of the Chemistry class did not pass their chapter 7 test if the class has 38 students how many students did not pass their chapter 7 ...
November 4, 2013

math
How do I simplify -(5x+5)-4+8x
October 22, 2013

math
How do I simplify -9-(12-3x)
October 22, 2013

us history
Which of the following is true of the Spanish-American War? A. Racial tensions were suspended for the duration of the war. B. About one in ten American soldiers were black. C. Black soldiers referred to black Cubans as "Smoked Spaniards." D. The black soldiers who ...
October 1, 2013

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