Friday
December 9, 2016

# Posts by Annonymous

Total # Posts: 149

math
What is the coefficient of x in (x^4 + x^3 + x^2 + x + 1)^4?
April 26, 2016

Math
What is the shortest distance between the circles defined by x^2-10x +y^2-4y-7=0 and x^2+14x +y^2+6y+49=0?
April 9, 2016

Math
Thank you Reiny for helping! I understand the problem now! :)
April 8, 2016

Math
Let f(x) = (3x - 7)/(x + 1. Find the inverse f^-1(x). Once again, thank you so much for helping me!
April 8, 2016

Math
Suppose a(x) = 3x - 7 and b(x) = 2 - x^3. Find a(b(3)) - b(a(3)). Thank you for helping me!
April 8, 2016

Algebra
Let f(x) = x^2 - 2x. Find all real numbers x such that f(x) = f(f(x)). Thanks.
April 7, 2016

Astronomy
What percentage of the stars surveyed show evidence of planets? (a) About 50% (b) About 30% (c) Less than 5% (d) Less than 1% I posted this earlier but there was not no response. I think the answer should be 40% but there is no option for that.
March 4, 2016

Astronomy
My estimate using wobble, dimming and shifting came out to be 40%, but the answer does not have it. Any suggestions?
March 3, 2016

Astronomy
What percentage of the star's surveyed show evidence of planets? (a) About 50% (b) Less than 5% (c) About 30% (d) Less than 1%
March 3, 2016

Astronomy
Thanks a lot!
March 3, 2016

Astronomy
Newton’s version of Kepler’s third law is P^2 = 4pi^2/(G(M_1+M_2)) a^3. Since the square of the period P varies inversely with the sum of the masses (M_1 + M_2), the period itself depends on the inverse square root of the object masses. If a solar system has a star ...
March 3, 2016

Astronomy
I know the answer and I don't want it, but just give me the explanation.
March 3, 2016

Astronomy
What would be the approximate power-law slope of the 2-point correlation function if all galaxies were situated on thin filaments? (acceptable range of answers is +- 10% of the correct solution).
March 3, 2016

Calculus
A particle moves along the graph of the function y= 8/3x^(3/2) at the constant rate of 3 units per minute. The particle starts at the point where x = 1 and travels in the direction of increasing x. After one hour, what is the x-value, rounded to the nearest hundredth, of the ...
February 22, 2016

Math
A rectangular garden covers 16,000 ft2. Its length is 60 ft longer than its width. What is the width of the garden?
November 17, 2015

algebra
Point D(-3,5) is a vertex of triangle DEF. After rotation of the triangle about the origin D us located at (3,5). Which of the following was the rotation of the triangle? A. 90* (degrees) clockwise B. 90* Counterclockwise C. 180* D. 360*
November 1, 2015

algebra
1 3 4 are the answers
November 1, 2015

algebra
i was thinking all of them
November 1, 2015

algebra
which of the following are necessary to describe a rotation of a figure on a coordinate plane? choose all that apply the center of rotation the shape of the figure the number of degrees of the rotation the direction of the rotation
November 1, 2015

physics
The chimney of a stationary toy train consists of a vertical spring gun that shoots steel balls a meter or so straight into the air – so straight that the ball always falls back into the chimney. If the train is moving, under which condition will the ball fall back into ...
October 23, 2015

physics
The chimney of a stationary toy train consists of a vertical spring gun that shoots steel balls a meter or so straight into the air – so straight that the ball always falls back into the chimney. If the train is moving, under which condition will the ball fall back into ...
October 23, 2015

physics
A car of mass 1000 kg is on an icy driveway inclined at an angle of 33◦. The acceleration of gravity is 9.8 m/s^2 θ If the incline is frictionless, what is the acceleration of the car?
October 22, 2015

MATH
Susan spent 2/3 of her money on a shirt. If she has \$12.25 left, how much did the shirt cost?
September 26, 2015

Math
A 27 3/4 foot piece of rope will be cut into as many 2 1/2 foot pieces as possible. How many 2 1/2 foot pieces will there be and how much rope is left.
September 26, 2015

Math
You do 12 divided by 4 because you get 2 free erasers with each packet.
September 26, 2015

Criminal Justice/White Collar Crime
I think it`s D
September 26, 2015

MATH
Do you convert 16 3/4 to find out how many 1/4 pounds of hamburger you can make out of that?
September 26, 2015

Math
Thank you
September 26, 2015

Math
If Sally has \$48 in her wallet and she spends \$16 on a shirt. What fraction of the money did she spend on the shirt?
September 26, 2015

math
How do you multiply 16 3/4
September 26, 2015

math
Mike has 16 3/4 pounds of hamburger. How many 1/4 pound of burgers can he make.
September 26, 2015

math
\$59.00 divided by 0.6
September 26, 2015

Math
Or you can take 9/1-12/5
September 25, 2015

civics
The answer is C
June 1, 2015

English
Begin the introduction about your topic, then within your paragraph tell what your going to include in the others. The first sentence should tell what your doing with some kind of excitement that will make the reader want to read more.
April 29, 2015

English
I'm writing an essay about poetry. My thesis is how literal language used in poetry create more still and concrete image, while poetry that uses figurative language proves more feeling. I just have no idea how to start my introductory paragraph. What do I first say in the ...
April 29, 2015

perpendicular vectors
Find two unit vectors each of which is perpendicular to vectors (1, 1, 0) and (1,0,1) What I did: a x b = (1, -1, -1) |axb|=square toot 3 correct answer is +/- (1/√3 - 1/√3 - 1/√3) or =+/- 1/√3 (1, -1, -1)
February 11, 2015

Cross Product of Vectors
Find a unit vector perpendicular to a=(4,-3,1) and b=(2,3,-1) What I did: a x b = ((-3)(-1)-(3)(1), (1)(2)-(-1)(4), (4)(3) - (2)(-3)) =(0,6,18) Answer is (0, 1/square root 10, 3/square root 10)
February 9, 2015

Vectprs and Scalars
Why are some of these scalars and others are vectors? What's the difference and how can you tell? 1. a dot (b x c) 2. (a dot b) x (b dot c) 3. (a + b) dot c 4. a x (b dot c) 5. (a x b) dot (b x c) 6. (a + b) x c 7. a dot (b dot c) 8. (a x b) + (b x c) 9. (a x b) - c 10. a ...
February 9, 2015

Vectors/Scalars?
is (u dot v)dot (a dot c) a scalar quantity or vector quantity? What's the difference? (I'm thinking scalar since it has no direction and it only has magnitude.)
February 8, 2015

Vectors and Math
Find x, y, and z if 2(x,-1,4)-3(-4,y,6)-1/2(4,-2,z)=(0,0,0) What I did: (2x,-2,8)-(-12,3y,18)-(2,-1,1/2z)=(0,0,0) (2x-14,-1-3y,-10-1/2z)=(0,0,0) Textbook answer is -5, -1/3, -20
February 8, 2015

dot product of vecotrs
Question: Find (3a+b)dot(2b-4a) if a=-i-3j+k and b=2i+4j-5k I did: =3(-1,-3,1)+(2,4,-5)dot 2(2,4,-5)-4(-1,-3,1) =(-3,-9,3)+(2,4,-5)dot(4,8,-10)-(4+12,-4) =(-1,-5,-2)dot(0,-4,-6) =(0,20,12) =0+20+12 =32 The text book answer is -80. What did I do wrong/
February 7, 2015

Math: Intro to Vectors
but the left side has a negative sign in between the x and y, and if you multiply it by -2, it makes the x negative.
February 3, 2015

Math: Intro to Vectors
Left side = right side check type of question. x - (x + y)/2 = (x - y)/2 What I did was times the x in the left side by 2. I got: =(2x-x+y)/2 which equals =(x+y)/2 But the left side is (x-y)/2. What am I doing wrong?
February 3, 2015

Vectors
if a=3x+2y and b=5x-4y, find x and y in terms of a and b What I did: 2a=6x+4y +b=5x-4y --------- 2a+b=x 2(3x+2y)+(5x-4y)=x 6x+4y+5x-4y=x 11x=x 11x dvided by x = 11 ...that isn't the correct answer. The correct answer (according to text book) is x=2/11a+1/11b y=5/22a-3/22b ...
February 2, 2015

Chemistry
Calculate the normal boiling point of a compound that has a vapor pressure of 19.30kPa at 167 Fahrenheit and a vapor pressure of 1.86kPa at 77 Fahrenheit.
January 27, 2015

Math
(2/3)y= 15-6 (2/3)y=9 2y=3(9) 2y=27 y=27/2 y=13.5 To Check: Plug y back into equation (2/3)(13.5) +6=15
November 3, 2014

biology/cells
Plant, animal, bacteria and protist cells all can use sugar to make energy Plant cells and bacterial cells can use photosynthesis and animal cells do cellular respiration (more specifically- glycolysis).
November 3, 2014

Civic
Country A has always focused on producing cotton. Country B is a producer of coffee, grain, and textiles. Based only on this information, which statement is true about these two countries? (1 point) Country A exports more than Country B. Country A has a more diversified ...
June 2, 2014

Social Studies
How is affirmative action related to education and students?
March 23, 2014

Social Studies
I found to things: 1) that it limited the number of immigrants in the country 2) that it required a certain number of minority to be hired. Which one of the two is it?
March 23, 2014

Social Studies
What is a quota system?
March 23, 2014

Social Studies
What is affirmative action?
March 21, 2014

English
I think your topic sentences are okay, but you need to put more description in it. They need to flow so no one would get lost while reading. Make sure these facts are true and not what you think it is overall.
February 28, 2014

English
Hi can you check my topic sentences? Antigone and Creon argue as she fights for the gods and he fights for his beliefs, resulting in the division of the city. Despite of the many warnings he receives, Creon’s discounting of prophecy produces destruction due to his ...
February 28, 2014

Algebra 1
Subtract them so the x's cancel out. Then solve for y, and plug it back in.
February 28, 2014

Geometry
Find the area of the circle than multiply it by the height to get your answer.
February 28, 2014

science
A lever scale is balanced with a beaker filled of air on one side. The scale is very sensitive and can easily measure a change in weight of about 1/2 mg. What happens If you put your finger carefully into the beaker without touching the glass?
February 16, 2014

physical science
Vi up = 10 sin 60 = 8.66 m/s if ax is horizontal acceleration, there is none. Horizontal component of velocity is constant
February 15, 2014

science
Hello Damon i have asked my teacher and he said that the air part is not what you said. He gave me one more chance to tell him what is the right answer.
February 13, 2014

science
A lever scale is balanced with a partially filled glass of water on one side. Will the balance be upset (and if so how?) if you put your finger carefully into the water without touching the glass? What happens if the beaker is filled with air instead of water?
February 13, 2014

English
ok thank you.
January 10, 2014

English
What is the tone in "The Bungrass Edge of the World" By Annie Proulx?
January 10, 2014

English
thank you. You should read it. it is interesting
January 2, 2014

English
would the tone for "The Life You Save May Be Your Own" by Flannery O'Conner be selfish because Mr. Shiftlet wants the car only and the mother is looking for any man to hand her daughter to?
January 2, 2014

College
What id the difference between University of maryland college park and University of Maryland Baltimore? I know they are at different locations but which one has what? I looked online but got so many different answers that i got confused.
December 11, 2013

Health/profession
thank you
December 10, 2013

Health/profession
when i looked at UMD, it said Pre-Medicine (Allopathic, Osteopathic, Optometry, Podiatry). What does that mean? I looked up the words, but I don't know why it is placed there though.
December 10, 2013

Health/profession
If I wanted to become a cardiovascular surgeon, would I take pre-medicine for osteopathic?
December 10, 2013

physics
A merry-go-round (pictured) is sitting in a playground. It is free to rotate, but is currently stationary. You can model it as a uniform disk of mass 200 kg and radius 110 cm (consider the metal poles to have a negligible mass compared to the merry-go-round). The poles near ...
December 7, 2013

pre-algebra
November 14, 2013

eng 1511
He thought that he could afford to pay his own school fees.
August 22, 2013

Two six sided dice were rolled, and a friend tells us that the numbers that came up were identical. Find the probability that the sum of the numbers was as follows: a) 4 b) 11 c) an even number d) an odd number
July 7, 2013

math
1/3 probability
July 7, 2013

math
John has 2 coins, one fair and the other unbalanced so that the probability of its coming up heads is 2/3. He picks one of the coins at random, tosses it, and it comes up heads. What is the probability that he picked the unbalanced coin?
July 7, 2013

math
Three boxes, labeled A,.B. C, contain 1 red and 2 black balls, 2 red and 1 black balls, and 1 red and 1 black ball, respectively. Compute the terminal probabilities by using the multiplication technique. Then add the terminal probabilities for all the outcomes in which the ...
July 7, 2013

math
A card is drawn from an ordinary deck of 52 cards, and the result is recorded on paper. The card is then returned to the deck and another card is drawn and recorded. Find the probability that the following occurs: a) the first card is a diamond b) the second card is a diamond ...
July 7, 2013

algebra
a) 143/5544 b) 2808/5544 c) 2736/5544
July 7, 2013

So what I think is that first you havr to add 4 to the number you are starting with and keep on going. Basically you are skip counting by 4 but is starting on the number you are given.
January 14, 2013

English-CItation
MLA 7th edition..I am using citation machine I don't know which one of the categories I need to use because I need to show the pages too...
December 21, 2012

math
On three tests you earned grades of 88%,94% and 90%. Each test was worth 150 points. The final exam is worth 250 pts. How many pts do you need on the final exam to earn 93% of the total points on tests? What percent do you need on the final?
December 4, 2012

math
The final exam is worth 250 points. How many points do yu need on the exam to earn 93% of the total points ? What percent do yu need on the final?
December 4, 2012

math
how do you get the percent of 1 over 12
November 27, 2012

Algebra
The equation is 5= -z - 3 Why is the answer -8 and not just positive 8? Please explain the whole negative variable thing.
September 4, 2012

Chemistry
What mass of ice would you have to add to water to get the same change in temperature as if you add 7.55 grams of dry ice to water if they both started at the same temperature?
April 17, 2012

physics
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast would the student have ...
January 22, 2012

physics
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast would the student have ...
January 22, 2012

physics
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast would the student have ...
January 22, 2012

My homework asks of me to write a sentence for each word reflecting the scientific meaning and showing how I understand what the word means. I am so puzzled and stuck. I have figured out the definition for the words, but I don't know how to write the sentences. The words ...
September 25, 2011

psy 220
Choose a public figure who has acted unwisely. Describe if it was a lack of emotional intelligence, successful intelligence, or both that caused his or her lack of judgment.
July 11, 2011

math
If you make a glass in the shape of a right circular cone (martini glass) how wide would the glass be if it is 4 inches tall and again holds 12 ounces?
June 27, 2011

math
How tall would a glass (in the shape of a right circular cylinder)with a diameter of 3 inches need to be to hold 12 ounces.
June 27, 2011

math
one fluid ounce of liquid is approx. 1.73 cubic inches so how many cubic inches are there in 12 ounces.
June 27, 2011

principles of marketing
what would be a good emotional advertising topic? I am having such a hard time trying to find something to write about please help me.
May 28, 2011

emotinal advertising on life that have a marketing
what is a good marketing focused emotional advertising on living
May 28, 2011

pinciples of marketing
what is a good emotinal advertising that could be used that would have a marketing focus
May 28, 2011

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