Saturday
August 30, 2014

Posts by Maria


Total # Posts: 1,489

Math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x2 + 3x + 5. which one is correct: {0.93, –0.60} {-9, 3} {–0.33, –0.56} {–1.80, 0.60}
November 25, 2013

Math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -3x2 + 4x + 3. answers: {–1.00, 1.33} {-3, 4} {–1.33, –1.00} {–0.54, 1.87} Please advise
November 25, 2013

math
Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -7x2 + 5x + 9. -7/5 9 5/14 -5/7
November 24, 2013

Math
consider the equations:f(x)=-6x-1 and g(x)=4x^2 Select the solution for (f+g)(x) A) -6x-1+4x^2 B) -24x^3 - 4X^2 C) -24x^2 - 1 D) -6X -1 - 24X^2 I think the answer is A. Please help
November 24, 2013

English
Jaycee______ himself yesterday when he ran into the goal post. A. Hurt B. Hurted
November 19, 2013

Math
This is for a second grader. He only works in WHOLE numbers still. I believe this was a mistake on the teachers' part. Should have been "one number is 3 more than the other", I think. Thank you for your help.
November 14, 2013

Math
My second grader brought home this math problem for which I can find no solution. The sum of two numbers is 21. One number is two more than the other. What are the two numbers?
November 14, 2013

Algebra
A manufacture sells watches for $31. The manufacture has a fixed cost of $6000 per month and variable cost of $15 per watch. How many watches must be sold to break even? Please show all work!
November 10, 2013

Statistics
Using a 0.05 level of significance, test the hypothesis that the probability of the NCAA Division I basketball champion being from the Pac 10 is 20%. Repeat the test for the hypothesis that the probability the champion is UCLA is 20%. What do these results say about testing ...
November 7, 2013

Genetics
Why are we using more dilute cultures for the killing curve while we are using the arg selection culture at full strength? 1. The reason that we are using a more dilute culture for the killing curve is because we want to know how UV light exposure at different time intervals ...
November 4, 2013

Math
solve: x-squarerootx-2=4 and write 1+4i over 1-i in the form a+bi
November 3, 2013

Spanish
Raquel y yo queremos alquilar videos. La respuesta seria: Leonardo quiere alguilar videos con nosotros o nosotras? I am confused with nosotros o nosotras. Please help me.
November 3, 2013

Spanish
Raquel y yo queremos alquilar videos. La respuesta seria: Leonardo quiere alguilar videos con nosotros o nosotras? I am confused with nosotros o nosotras. Please help me.
November 3, 2013

GCC
PREDICT THE REACTION MG(NO3)2(AQ)+NA(S)
October 29, 2013

chemistry
A typical bathtub can hold 106 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 56 ◦F to 87 ◦F. Assume that the natural gas is pure methane (CH4) and that the products of combustion are ...
October 26, 2013

chemistry
a 100 W electric heater operates for 10 minutes to hear the gas in a cylinder. At the same time, the gas expands from 1 L to 14 L against a constant atmospheric pressure of 4.246 atm. What is the change in internal energy in Joules of the gas?
October 25, 2013

CHEMISTRY
a solution of sodium hydroxide is standardized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.404 g; buret reading before titration 0.13 mL; buret reading after ...
October 18, 2013

chemistry 101
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 0.590 grams. What is the molarity of the AgNO3 solution? Answer in units of M
October 18, 2013

chem 101
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 0.590 grams. What is the molarity of the AgNO3 solution? Answer in units of M
October 18, 2013

math
margaret paid $87 for a skirt and a blouse. the skirt costs twice as much as the blouse. what was the cost of the skirt?
October 18, 2013

math
mrs. atkins pays $1800 for a new refrigerator, washer, and dryer. the refrigerator costs $250 more than the washer. the dryer costs half as much as the washer. how much does the washer cost?
October 18, 2013

CHEMISTRY
n unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 52 . 5 mL of 6 M HCl. Calculate the concentration of the di- luted NaOH solution. Answer in units of M
October 18, 2013

religion/theology
I was wondering if there was a group or social movement through its work influenced teachings in Catholic Social thought
October 12, 2013

science
in each duagram a black circle represents a[particle of salt . white circle represents particles of water. which diageram coorecctly showws a solution
October 1, 2013

Physics
A small airplane has a speech of 200km/h with respect to the air. There is strong wind blowing at 77km/h at 23 north of east with respect to the Earth . A) in which direction should the plane head in order to land at an airport due north of its present location?B) what would ...
October 1, 2013

Physics ...... Science
A small airplane has a speech of 200km/h with respect to the air. There is strong wind blowing at 77km/h at 23 north of east with respect to the Earth . A) in which direction should the plane head in order to land at an airport due north of its present location?B) what would ...
September 30, 2013

algebra
An herbalist has 30 oz of herbs costing $2 per ounce. how many ounces of herbs costing $1 per ounce should be mixed with these 30 ounces of herbs to produce a mixture costing $1.60 per ounce?
September 27, 2013

Early Childhood Literacy
A family-teacher study meeting should NOT include: A. classes on setting up a home library. B. information about the importance of play. C. a “make it/take it” class on homemade reading materials.D. a teacher-parent conference.
September 26, 2013

Chemistry
Why is it suggested you use weighing paper or a watch glass instead of filter paper on which to allow a sample to dry? Please give two examples.
September 18, 2013

math, please help!!!!
Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water
September 13, 2013

math
Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water
September 13, 2013

physics
A car comes to rest uniform deceleration at the rate of 5.8 m/s2 for 14.3 seconds. What is distance did it travel during this time??
September 13, 2013

Math
A Classroom bulletin board is 7 feet by 4 feet. If there is a picture of a student every 6 inches along the edge, including one in each corner, how many pictures are on the bulletin board? The teacher gave me the answer 40 but I don't know how.... Can you help me, please
September 10, 2013

Chapter 8 Vocabulary ,8 th grade
I need help on this I don't know the answer....
September 8, 2013

Algebra
Please help with this factoring problem: 2x^3/2 − 6x^1/2 + 4x^−1/2 what i did first was make all the exponents whole numbers, so I got: 4x^3-36x+16x^-1 I don't know what to do from there.
September 6, 2013

Marks: 1 A model rocket was launched to an altitu
Marks: 1 A model rocket was launched to an altitude of 54,925 feet. How many feet above 10 miles did it travel? Choose one answer.
September 5, 2013

calculus book
sorry i am new to this website. Do any of you know any website that offer free or cheap online book. Calculus Early Transcendentals, 10th Edition NEW! Howard Anton, Irl C. Bivens, Stephen Davis THANK U.
August 29, 2013

Science , physics
At the beginning of an invertigation , a student determines that the temp. of a beaker of water is 99.8+_ 0.1C . At the end of the investigation , the temp. Is 35.5+_ o.1C . What is the change in temp.?? My answer is 64.5+_ 0.2 C . Is this right ? Thank you!
August 27, 2013

Math
The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1,390 will be returned because they are damaged. The terms of sale are 2/10, n30 ROG. The shipment arrives on May 26 and Empire ...
August 22, 2013

science............help
why laws of nature really exist?
August 22, 2013

science
Can you make it is clear ! Can you give me an example abou it ? Thank a lot!
August 22, 2013

science
why the author is attempting to express in the passage 'Recognizing that personal and cultural beliefs influence both our perceptions and our interpretations of natural phenomena, we aim through the use of standard procedures and criteria to minimize those influences when ...
August 22, 2013

science
do you believe that theories can never be proved, only disproved?
August 21, 2013

Science
Why does tha physicist believe," a measurement without a quoted error is meaningless "? Please help!!
August 20, 2013

Science ,
can you explain for me ? it is hard to understand.!!
August 20, 2013

Science ,
Do" laws of nature" really exist ?
August 20, 2013

Physic,
Why does the author believe ," a measurement without a quoted error is meaningless?
August 20, 2013

maths
Which post Henry?
August 6, 2013

maths
Find the angle between the line y=2x and the points (-1;7/3 ) and (0;2)
August 6, 2013

analytical chemistry
How many grams of H3BO3 and mL of NaOH (with concentration 0,1M) should you add, to get a 500mL buffer, with pH 9. pKa=9,236
July 30, 2013

Psychology
In their book The Bell Curve, Murray and Herrnstein supported their claim of intelligence differences between races and attributable to.
July 27, 2013

english
write sentences with nouns:blessing,miracles,mystery,defect sacrifice
July 15, 2013

english
1-have you ever searched for information on the internet?Describe the process you used. 2-Is information from the internet as good as information from a library?explain>
July 15, 2013

english composition
i am having trouble coming up with a topic. thanks for the link.
July 6, 2013

english composition
please help me to create division and classification prewriting essay.
July 6, 2013

math
Factorial notation problem. Please help? Hi, I am stuck on this maths problem. Solve for n: (n+2)!/(n)! =110. I get as far as (n+2)(n+1) = 110. When I multiply it out I get n^2,3n,2 = 110. There is only one example similar to this in my book and it used a quadratic equation to...
July 3, 2013

physics
a skaterboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. how much higher is he when he comes to a stop? (energy problem)
June 21, 2013

physics
a skaterboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. how much higher is he when he comes to a stop? (energy problem)
June 21, 2013

science (physics)
a skaterboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. how much higher is he when he comes to a stop? (energy problem)
June 21, 2013

Physics
A syringe which has an inner diameter of 0.6 mm is attached to a needle which has an inner diameter of 0.25 mm. A nurse uses the syringe to inject fluid into a patient's artery where blood pressure is 140/100. Assume the liquid is an ideal fluid. What is the minimum force ...
June 16, 2013

Biology
Hi My bio HW is asking what are the symptoms and host response for tuberculosis.... i have the symptoms but I need help with what the host response are.... Thanks
June 12, 2013

Chemistry
C2H6 gas and CO2 gas are contained separately in 1.0 L bottles. What do the gases in the bottles have in common? Assume both gases are at STP
June 8, 2013

Biology
Describe how you would prepare 10 mL each of 2 M, 1.5 M, and 1 M NaCl solutions from a 2 M stock NaCl solution. Describe your actions–exactly what you would do –step-by-step–when preparing this solution. Also show all calculations. Be sure all amounts include ...
June 5, 2013

Math
3√(11x^3y)÷-2√(12x^4y)
June 2, 2013

Chemistry
Describe the subatomic structure of the nucleus, including the structure of each nucleon. Describe the forces that hold the nucleus together Explain how beta emission works.
May 31, 2013

Vectors
A 10-kg mass is suspended by two strings of length 5m and 7m attached to two points in the ceiling 10 m apart. Determine the tension on each string. Round your result to one decimal place (include a vector and position diagrams)
May 28, 2013

history
What factor is primarily responsible for the sharp contrasts between Old World and New World civilizations?
May 21, 2013

calculus (gr 12)
the productivity of a person at work (on a scale of 0-10) is modeled by a cosine function: 5cos (pie/2t) +5, where t is in hours. If the person starts work at t=0, being 8:00 am, at what times is the worker the least productive? a) 12pm B) 10 am and 2pm C) 11 am and 3 pm D) 10...
May 14, 2013

Grade 12 Calculus
solve cosx= (squareroot3)/ 2 where 0 <(with a line underneath) x <(with a line underneath) 2 pie a) how many solutions are possible? b) in which quadrants would you find the solutions? c) determine the related angle for the equation. d) determine all the solutions for ...
May 11, 2013

History
Where was segregation illegal after and during the boynton vs. Virginia case?
May 9, 2013

history
1. What was the ruling in the case Boynton vs. Virginia?+ m,n
May 9, 2013

calculus
hi im back.. solve cosx= (squareroot3)/ 2 where 0 <(with a line underneath) x <(with a line underneath) 2 pie a) how many solutions are possible? b) in which quadrants would you find the solutions? c) determine the related angle for the equation. d) determine all the ...
May 8, 2013

calculus
Hi i have two questions: what is the exact value of cos 5(pie)/12? what is the exact value of cos2(pie)/9 cos(pie)/18 + sin2(pie)/9 sin(pie)/18? thank you
May 8, 2013

geometry
Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole? step by step on how to do it?
May 8, 2013

programming
draw a flowchart and write a program and pseudocode that prompts the user for a starting balance and then prints the number of years it takes to reach 100000 and also number of years it takes to reach 1000000
May 8, 2013

2
from 962 which eves number has 6 tens
May 7, 2013

chemistry
how many grams of carbon dioxide can be produced when 15.g of oxygen is reacted with 25.g of c2h2
May 6, 2013

Biology
How does the changes in the DNA code from CTT to CAT in the beta chain of haemoglobin affect cell activity?
May 6, 2013

mill creek high
what are some examples of archetype in the book
May 6, 2013

Grammer Please Help!!
Last night, Jason introduced me to a friend of his. Whose hair was all the way down to the back of his kness in a single dreadlock.
May 2, 2013

algerba 2
the length of a rectangle is (x-2)squared and the width is (5x+1) what is the perimeter of the rectangle
April 19, 2013

Calculus
1) Find the linearization of f(x) = sin(x) at x = 0 AND use it to estimate sin(pi/87.129)
April 16, 2013

Math
Suppose that you invest $6384 in an account that earns interest at an APR of 4.6%, compounded monthly. Determine the accumulated balance after 9 years.
April 15, 2013

5th grade math 12-6
Using
April 15, 2013

Math
Juan races his bicycle for 196ft a wheel of his bicycle turns 28 times as the bicycle travels this distance. What is the diameter of the wheel?
April 13, 2013

matematicas
¿cual es el area de un terreno rectangular de 15.5 x 10.1m?
April 9, 2013

chemistry
calculate the L of 5.00 M HCI required to neutralize 500.0 mL of 1.00 M Ca (OH)2
April 9, 2013

grade 12 life orientation
Air pollution is one such environmental problem that causes ill health, accidents, crises, [ [ [ and disasters within any community within South Africa or globally.Air pollution is a significant risk factor for multiple health conditions including respiratory infections, heart...
March 30, 2013

ap chemistry
is there any online test that tells me in which area i am weak or strong?
March 27, 2013

ap chemistry
WHERE CAN I TAKE AP CHEMISTRY ONLINE DIAGNOSTIC TEST?
March 27, 2013

Chemistry
How many grams of silver will be produced on the reaction of 50.00g iron metal with an excess of a copper (ii) sulfate solution ?
March 25, 2013

Physics
A rectangular conducting homogeneous (which means the material is the same throughout) block has dimensions 1cm x 2cm x 3cm . A voltage V is applied between all opposite faces of the block and the corresponding currents were recorded. What is the maximum current measured in ...
March 20, 2013

statistics
A service station has a pump that distributes diesel fuel to automobiles. The station owner estimates that only about 3.2 cars use the diesel pump every 2 hours. Assume the arrivals of diesel pump users are Poisson distributed. a. What is the probability that three cars will ...
March 19, 2013

Chemistry ....help
If NaNO3 is cooled from 70C to 10C ; how much solid NaNO3 will come out of solution as a solid salt? Help me !!!
March 18, 2013

Office Management
Thank you! :)
March 16, 2013

Office Management
Note: telecommuting has its advantages and disadvantages. It eliminates the hassle of driving to work in inclement weather or heavy traffic as well as the chore of finding a parking place. Some employees report that they get more work done at home, while others struggle to ...
March 16, 2013

Office Management
My reading knowledge would choose A. However - if seperating from work and family, how would a telecommuter succeed if they are having trouble. Then, I thought about C. Because they obviously can seperate work and hom because they are motivated and independent. At this point, ...
March 16, 2013

Office Management
Last one: Among the following employees, a person who _______ would most likely succeed as a telecommuter. A. has difficulty separating work and family B. has a hard time prioritizing work tasks C. is very motivated and independent D. is very outgoing and social
March 16, 2013

Office Management
That is what I thought, but when I was looking over my previous answer for this exam, the I have had 4 answers with the Letter D. I was very unsure! :/
March 16, 2013

Office Management
When conducting a performance appraisal, it's important for the supervisor to A. provide only positive feedback no matter what the actual performance has been. B. avoid addressing employee concerns until after the appraisal has been signed by the employer. C. make sure the...
March 16, 2013

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