# Posts by justin

Total # Posts: 962

math
in a family with two children, what are the probabilities of two boys, the first is a girl the second is a boy, neither is a girl, at least one girl, assuming that the birth of boys and girls is equally likely.

Psychology
What is social facilitation and how has the definition evolved"

english
I need help on passive voice. Is the following sentence passive voice? The results of the aptitude test were told to us by the principal.

sicence
Surface waves cause the most damage, but they are ironically called _____. Loose waves Love waves Light waves Lemon waves

mathmatics
6 x (5min 29s)

algebra
(x^2+6x+9) + (y^2-4y+4)= 12+9+4 is equal to (x+3)^2 + (y-2)^2=25 How, if this works, is it related to a perfect square quadratic? Have we seen this work done before with something other than circles?

Math
I need help trying to figure out how my teacher got from (x^2+6x+9) + (y^2-4y+4)= 12+9+4 to (x+3)^2 + (y-2)^2= 25

chemistry
how many grams of kno3 should be used to prepare 2.00 l of a 0.500m solution

chemistry
how many grams of kno3 should be used to prepare 2.00 l of a 0.500m solution

chemistry
how many grams of kno3 should be used to prepare 2.00 l of a 0.500m solution

chemistry
how many grams of kno3 should be used to prepare 2.00 l of a 0.500m solution

math
if the ratio of the diameters of two spheres is A to B then what is the ratio of their volumes

English
I have to write a essay explain a crisis and having a hard time thing of one that would be full of information. so i need a topic.

pre algebra
-2 over three + -4 over 5

calculus
find dy/dx x=sin y

Math 156
False

Physical Geography
70 degrees N 0 degrees S 15 degrees E 44 degrees N 160 degrees W 88 degrees S 90 degrees N 90 degrees W 1) how many of the above grid lines run half-way around the world? 2) how many of the above are seen as points on the globe? 3) how many run east-west? 4) how many of the ...

English
I have to write an essay that has to do with definitions that are arguable. and i cant think of a one. please help me thank you

math
some times its (cold) u r down and sad other times its (hot) u r happy and uprising

complete and simple subject
in this sentences (Some people like to take classes to learn new things.) i think that the complete subject is (some people) and the simple subject is (some) i need help understanding how i can find a complete and simple subject in a sentence

complete and simple subject
i think that the complete subject is (some people) and the simple subject is (some)

complete and simple subject
where is the complete and simple subject in this sentence (some people like to take classes to learn new things.)

math
housewhole item less ten 90 degree

Algebra 1/2
I'm so confused about this worksheet too! I got the front side done but not the back, it's hard.

Physics
how far would a geese fly at a speed of 40 mile per hour for a time of 16 hours

30×3=90

writing
In society today, some families don't have essential needs of financial stability, attention of their parents, and a comfortable household to grow up in a stable environment which lead to a dangerous future ahead. Comparing to that and our own vision of a model of an ...

Writing
How do I list multiple titles on a title page for an APA paper? For a final, there are 3 separate topics that will be covered, all broadly related, but not enough for a single title. Instructions were to include a single title page.....how would these be listed according to ...

American Gov
Use the link below to explore the exit poll results for past elections. Choose the poll results for your state. Research and take notes on the polls and the data provided. Then, write down ten results from the polls that indicate something interesting about the relative ...

Social Studies
Why is killing innocent people during war a bad thing?

Problem Solving
The answer I got was \$116.54 weekly. If you divide his bi-weekly in half and multiply by 52 (weeks in a year), then divide by 12 (months).

Social Studies
I agree with you. I will let my parents know so they can talk to the teacher and I'm not going to answer this question when the question is false. I have one more question. Some people believe that war is wrong because innocent lives are being killed. How can I expand on ...

Social Studies
Why are Protests during war are unethical and unpatriotic. This was a bonus question that are teacher gave us worth 10 extra points.

chemistry
the volume, in liters, of 835 g SO3 at STP

Meaning
Its in my science text book. It was talking about new technology advancements.

Meaning
What does this mean? artificial intelligence could enable radical shifts in the balance of power.

Meaning
What does a quarantine area mean?

english
explain Romeo and Juliet Scene 4 A street near the Capulet house.

ALgebra
yes sorry

Algernr 2
Can someone please help me with these equations. 2x(x+2)(x^2 - 2x + 4) = 0 and Simplify (be sure to rationalize all denominators) 3/[SQRT(5) - 2]

Chemistry
If 2.50 g of CuSO4 are dissolved in 9.4 102 mL of 0.34 M NH3, what are the concentrations of Cu(NH3)42+, NH3 and Cu2+ at equilibrium? i tried doing Cu2+ first and i did Kf=5e13= salt/cu2+ nh3+^4 and i did molesCuSO4/.94 L = .01666 M salt so then i did .01666M/[cu][.34-(4*....

hard probability question
correction, on actually is one

hard probability question
four different written driving tests are administered by the MVD. on of these four tests is selected at random for each applicant for a drivers test. if a group consisting of two women and three men apply for a license, what is the probability that a. exactly two of the five ...

Chemistry
"X" is used to indicate a variable group amongst a class of compounds (though usually a halogen)

Math
I need to find the surface area and volume of a right regular hexagonal prism. The height is 10cm and the sides of its base measure 18cm. You round to the nearest hundredth.

College Algebra
3 6 8x +27y Factor the binomial

computer
unscramble this word ienerpgcd

Physics
Uhm, to get the length of the diagonal, you should compute it using pythagorean theorem sqrt(.1^2+.1^2)=0.141

English
Vocabulary

If a car is traveling 60 miles per hour, how far does it travel in one minute? Thanks

uc probation
My question was can a student be put on academic probation if his gpa falls below a 2.0 during a SUMMER SESSION?

Spanish
Can you help me unscramble this Spanish word: Doucra?

What are the type of clauses? Give examples of clauses.

algebra with pizzazz
why did king kong eat a truck?

chem
25.8 degrees Celsius

Math
What property is shown? 9.5 + 6.1 + 2.3 = 9.5 + 2.3 + 6.1 5.1(7.4 - 3.1) = 5.1(7.4) - 5.1(3.1) Round to the nearest tenth 1.58 (divided by) 1.1 Change each measurement to the given unit 5.17 kL = _ km 2km 7 m = _ km Find each product mentally using the distributive property 3(...

math
well is the answer 2,3,5 and 29

math
what r the factors of 870

on a 30-board used for factors. pick two different numbers on the 30 board that will give you the largest number when you multiply them together

IN THE BOOK LYDDIE HOW DID THE FAMILY ESCAPE THE BEAR INTRUSION?

social studies
mexico city is surrounded by mountains. what effect has this had on the air quality in this city?

Math
Solve : 2x - 3 = 5

Calculus
f(x)=4sinx/1+cosx find f'(x) this is what i got and i dunno what i did to get it wrong (4cos(x)+ 4cosx^2-4sin(x)^2)/cosx62

Calculus
Let f(x)=9sinx/2sinx+4cosx Then f'(x)=________ . The equation of the tangent line to y=f(x) at a= pi/2 can be written in the form y=mx+b where m= _____and b=_____

Trig
Find sec theta if sin theta = -4/5 and 270 degrees < theta < 360 degrees.

science
Do enzymes speed up or slow down chemical reactions?

chem-help
the bright yellow light emitted by a sodium vapor lamp consists of two emission lines at 589.0 and 589.6 nm. what are the frequency and the energy of a photon of light at each of these wavelengths? what are the enegies in kJ/mol

Philosophy
1. Determine whether the following arguments are valid or invalid. If valid determine whether they are sound. Be sure to explain what validity is and how you determine whether an argument is valid or not. Explain your answers in as much detail as you can. There is no length ...

if (x,y) are the coordinates of a point p in the xy plane then x is called _______ of p and the _______ of p

biography
where can i find information on queen latifah. i have to write a biography about her..

math
lol dud

math
No space?!? Lol I need help!

math
if 20 counters are the whole set,what fraction of the set is 16 counters?

spanish
Can you please tell me if my paragraph is correct? Thanks. Tenia hoy un mal dia. Primero me cai de mi cama. Entonces no habia agua caliente. Finalamente la parte peor de toda eq que camine' en heces del perro. El dia es desmesurado.

Science
How do can we help marshes

Math
It was 47F today. How many degrees above freezing is this? Number Sentence____________________ Answer____________

math
2 thirds of 25

english
I need help

Math Analysis
A quartic polynomial Q(x) with real coefficients has zeros 2+i and 3-2i, find the other two zeros.

math
yes, but you put the commas like this: 1,800,000

Calculus
Use the Midpoint Rule with the given value of n to approximate the integral. Round the answer to four decimal places. int_2^10 2 sqrt(x^2+5)dx text(, ) n=4

calculus
Consider the given function. f(x) = 3 sin(6x) text(, ) 0<=x<=(3pi)/2 (a) Find the Riemann sum with six terms, taking the sample points to be right endpoints. (Give your answer correct to six decimal places.) R6 = (b) Repeat part (a) with midpoints as sample points. (Give...

calculus
Consider the given function. f(x) = 3 sin(6x) text(, ) 0<=x<=(3pi)/2 (a) Find the Riemann sum with six terms, taking the sample points to be right endpoints. (Give your answer correct to six decimal places.) R6 = (b) Repeat part (a) with midpoints as sample points. (Give...

Calculus
Use the Midpoint Rule with the given value of n to approximate the integral. Round the answer to four decimal places. int_2^10 2 sqrt(x^2+5)dx text(, ) n=4

social studies
what magical figures were wrapped within a mummies wrappings

mass affects on energy
I need to come up with an experiment for observing how mass affects energy. Does anyone have any suggestions?

physics
8.1*10^4

more chemistry this time concentration
Some of the problems. I honestly have no clue how to do these/where to look for answers. What is the concentration of 5.28*10^14 Carbon Tetrachloride molecules dissolved in 149 mL of water? How many grams of Carbon Dioxide will there be in a 16.43 mL of a .03M solution.

Chemistry=MOLES!
I'm having trouble converting moles to grams and finding the mass of molecules. Problems I'm stuck on: What is the mass in grams of .99x10^49 Sodium Chloride Molecules? and How many moles of Cu are in 9.61 grams? and How many moles are in 5.94x10^45 Ne atoms? I just ...

References
what about if it is a website? Is it the date i first visited that website?

References
In APA citation format, there need to include Retrieved Date. What does Retrieved mean? What date should I put?

physics
3.9 m/s2

A friend of mine is planning on becoming an insurance agent, he is trying to decide whether he should represent just one insurance company, or several companies. Can you help me think of some of the pros and cons for each option.

Maths
What's the answer for x^2-2x+3 and 2x^2+9x+4?

math
how to do factor completely

math repost!!
please help, i procrastinated and now this is due tomorrow!! A tangent line is drawn to the hyerbola xy=c at a point P. 1) show that the midpoint of the line segment cut from the tangent line by the coordinate axes is P. 2) show that the triangle formed by the tangent line and...

math
A tangent line is drawn to the hyerbola xy=c at a point P. 1) show that the midpoint of the line segment cut from the tangent line by the coordinate axes is P. 2) show that the triangle formed by the tangent line and the coordinate axes always has the same area, no matter ...

MATH!!
Find equations of both lines through the point (2, -3) that are tengetn to the parabola y=x^2+x i got the derivative as y prime = 2x +1, and i don't know where to go from there. PLEASE HELP this is due tomorrow!!!

math
Given: x+(1/x)= square root of 3 PROVE: (x^13)+(1/(x^13))= square root of 3

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