Tuesday
July 29, 2014

Posts by Maria


Total # Posts: 1,494

Math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x2 + 2x + 6 answers available, which one is correct? {–1.30, 2.30} {-2, 2} {–1.00, –3.00} {–0.33, 0.33}

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}

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

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

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

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

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.

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?

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!

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 w...

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 e...

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

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.

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.

GCC
PREDICT THE REACTION MG(NO3)2(AQ)+NA(S)

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 c...

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?

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 titrati...

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

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

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?

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?

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

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

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

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 b...

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 b...

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?

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.

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.

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

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

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??

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

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

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.

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.

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.

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!

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 w...

science............help
why laws of nature really exist?

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

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 ...

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

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

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

Science ,
Do" laws of nature" really exist ?

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

maths
Which post Henry?

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

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

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

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

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>

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

english composition
please help me to create division and classification prewriting essay.

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...

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)

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)

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)

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 ...

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

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

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 un...

Math
3√(11x^3y)÷-2√(12x^4y)

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.

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)

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

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...

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 t...

History
Where was segregation illegal after and during the boynton vs. Virginia case?

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

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 sol...

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

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?

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

2
from 962 which eves number has 6 tens

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

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

mill creek high
what are some examples of archetype in the book

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.

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

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

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.

5th grade math 12-6
Using

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?

matematicas
¿cual es el area de un terreno rectangular de 15.5 x 10.1m?

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

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...

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

ap chemistry
WHERE CAN I TAKE AP CHEMISTRY ONLINE DIAGNOSTIC TEST?

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 ?

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 Am...

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 a...

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 !!!

Office Management
Thank you! :)

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 wor...

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, ...

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

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! :/

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