# 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

**5th grade Math**

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

**4th grade**

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?

**9th grade Lit. B**

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

**6th grade**

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

**12th grade**

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 ...

**12th grade math help!!!!**

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

**Business**

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

**Business**

What are the advantages and disadvantage of minimax regret criterion?

**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