Saturday

November 28, 2015
Total # Posts: 88,378

**Math**

At 8:00pm,the temps tire was16f by midnight ,the tempature had fallen by 19 f what was the tempature at midnight
*September 4, 2015*

**Physics**

Two cars are initially 10.5 km apart on a straight road. If the cars are moving toward each other, car 1 with a speed of 9.5 m/s and car 2 with a speed of 10.40 m/s, how many seconds will it take before the cars meet? Round your answers to three significant figures.
*September 3, 2015*

**geometry**

false
*September 3, 2015*

**geometry**

false
*September 3, 2015*

**Physics**

Two cars are initially 10.5 km apart on a straight road. If the cars are moving toward each other, car 1 with a speed of 9.5 m/s and car 2 with a speed of 10.40 m/s, how many seconds will it take before the cars meet?
*September 3, 2015*

**Chemistry **

Determine the pH of a solution made by mixing 50,00 mL of 0,100 M nitric acid with 100 mL of 0,200 M nitric acid
*September 3, 2015*

**algebra**

3 (a2 + b ) - 4 ( a2-b ) =
*September 3, 2015*

**math**

P(-5, 5) is a point on the terminal side of θ in standard position. What is the exact value of sec θ?
*September 3, 2015*

**entrepreneurship 1**

YES! thank you
*September 3, 2015*

**entrepreneurship 1**

If you would be an entrepreneur what business would u like to own? what would be some concepts or what you would do. i'm trying to create a company but i don't know what i should do whether cleaning service, construction service etc, so i'm wondering what you would...
*September 3, 2015*

**ms.sue math **

Which sum will be irrational? a. 3 + 2 b. √19 + 7/2 ****** c. 18/3 + 11/10000 d. –6 + (–3.251) Which product will be rational? A.17.12 * 33 ***** B. √ of 3 * √ of 9 C.4*pie D.- √ of 20 * 15 A whole number is added to a number with two digits ...
*September 3, 2015*

**Syangempumelelo**

To prevent . To need help to soil wacker .to go to the clinic and deling with this
*September 3, 2015*

**Syangempumelelo**

For drugs
*September 3, 2015*

**Geometry **

A circle has a center at (3,5). The point (3,8) is on the circle. What is the circumference of the circle to the nearest tenth of a unit?
*September 3, 2015*

**LA**

abcdefghijklmnopqrstuvwxyandz
*September 3, 2015*

**LA**

abcdefghijklmnopqrstuvwxyandz
*September 3, 2015*

**LA**

abcdefghijklmnopqrstuvwxyandz
*September 3, 2015*

**physics**

B = 10 log (1)
*September 3, 2015*

**physics**

5 = 10 log (y/100)
*September 2, 2015*

**Math**

A mechanic can do a job in 2hr. It takes his assistant 3hr to do the same job how long would it take them to complet the job if they worked together?
*September 2, 2015*

**5th grade**

FB D
*September 2, 2015*

**Math (functions)**

Sorry the condition that must be satisfied is f(f(x)) = x for all x
*September 2, 2015*

**Math (functions)**

If we have the function f(x) = (ax + b) / (cx + d) with a,b,c,d real numbers for which values of a,b,c,d is the following true f(f(x)) for all x I do a whole lot of algebra and get that that a,b,c,d must satisfy some conditions : c*(a+d) = 0 (d^2) - (a^2) = 0 -b *(a+b) = 0 ...
*September 2, 2015*

**math**

Mfurncufngivjrivjti mti kfnvitidh
*September 2, 2015*

**ms sue math help please or anyone**

Which sum will be irrational? (1 point) a.3 + 2 b.start root 19 end root plus start fraction 7 over 2 end fraction c Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. d. –6 + (–3.251) Which product will be rational? (1 point...
*September 2, 2015*

**Chemistry**

A store owner would like to install a red illuminated sign. However, when she goes to purchase the sign, the list only includes the types of gases used, rather than the colors they produce. Which gas (H, Kr, He, Ne, Xe, or Ar) would you suggest she buy? In lay terms, explain ...
*September 2, 2015*

**Chemistry**

Write a brief discussion of the relationship between the atomic spectrum (number and position of the lines) and the electronic structure (shell model) of the gases. I know that the bigger the atom, less energy and so does that have something to do with this question?
*September 2, 2015*

**French**

Are these sentences correct? J’aime jouer au basket le dimanche à deux heures de l’après-midi. J’aime courir le mardi à six heures du soir. J’aime écrire le mercredi à dix heures du matin. J’aime jouer au tennis le ...
*September 2, 2015*

**Chemistry **

Classify each of the following as a heterogeneous mixture (M) or homogeneous mixture (S)or compound (C) or element (E). oxygen dissolved in water - S carbon mixed with sand - M apple juice - S vegetable soup -M sour, curdled milk -M steel -S hydrogen -E salt -E distilled water...
*September 2, 2015*

**help please with math thanks**

Which sum will be irrational? (1 point) a.3 + 2 b.start root 19 end root plus start fraction 7 over 2 end fraction c Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. d. –6 + (–3.251) Which product will be rational? (1 point...
*September 2, 2015*

**Algebraic word problem damon or steve plz interven it urgent**

i wil do dat,here is anoda.john is twice as old as his friend peter.peter is 5year older than alice.in 5years.john wil be three times as old as alice,how old is peter nw
*September 2, 2015*

**Life orientaion**

*September 2, 2015*

**math help ms sue please**

2nd A 17 point Modifying Above 12 with bar times 33 B start root 3 end root times start root 9 end root C 4 times pi D negative start root 20 end root times 15
*September 2, 2015*

**math help ms sue please**

ima get to the others one min
*September 2, 2015*

**math help ms sue please**

1st a 3 + 2 b start root 19 end root plus start fraction 7 over 2 end fraction c Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. d –6 + (–3.251)
*September 2, 2015*

**math help ms sue please**

k will soon srry thankjs though
*September 2, 2015*

**can anyone help me**

can anyone help me
*September 2, 2015*

**math help ms sue please**

Which sum will be irrational? (1 point) 3 + 2 start root 19 end root plus start fraction 7 over 2 end fraction Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. –6 + (–3.251) Which product will be rational? (1 point) 17 ...
*September 2, 2015*

**Math**

I assume that since you put 680 m there, the bike must have traveled 680 meters in 50.4 seconds. However, it is supposed to be 680/50.4, so 680/50.4 is approximately 13.49 mps. Your answer is correct, but change your work.
*September 2, 2015*

**Math**

Post the entire question. The question isn't complete; we don't know all the measurements(numbers) that way.
*September 2, 2015*

**math help please**

Which sum will be irrational? (1 point) 3 + 2 start root 19 end root plus start fraction 7 over 2 end fraction Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. –6 + (–3.251) Which product will be rational? (1 point) 17 ...
*September 2, 2015*

**Pre-Calc**

Find the degree measures of the radians given. 1. pi/15 rad = 12 degs 2. -9pi/2 = -810 degs 3. 5pi/3 = 300 degs 4. -3pi/4 = -135 degs 5. pi/10 = 18 degs 6. -11pi/15 = -132 degs 7. In which quadrant is -11pi/9? = quadrant 2 8. Find one positive and one negative coterminal angle...
*September 2, 2015*

**Math**

Its B)112
*September 2, 2015*

**Math**

Which one do you think it is?
*September 2, 2015*

**Pre-Calc**

Is 300 an angle between 0 and 360 degrees that is coterminal with -780 degrees?
*September 2, 2015*

**Social Studies**

Ok, Thank You so much!!!!
*September 2, 2015*

**Social Studies**

The Dutch ??
*September 2, 2015*

**Social Studies**

Use the quote to answer the question: "The natives are too happy to share…… for a copper kettle and a few toys, as beads and hatchets, they will sell you a whole Country…." Which European power was able to purchase a valuable island with "a few ...
*September 2, 2015*

**science**

when kcn reacts with nh4cl to give
*September 2, 2015*

**Physics**

A is south and b is north Sorry i made a mistake
*September 2, 2015*

**Physics**

A. V=d/t = 50m/20s = 2.5 m/s north B. V=d/t = 50m/22s = 2.27 m/s south C. V= 50m-50m/20s+22s = 0m/s Im not sure of c.
*September 2, 2015*

**Reading**

In which sentence is the word periscope used correctly? A. Excited about her finding, the scientist used a periscope to view the organisms in the water sample.**** B. On the night of the full moon, we used the periscope to look at the sky. C. Sitting behind the tall stone ...
*September 2, 2015*

**life orientation grade 11**

Pollution
*September 1, 2015*

**life orientation grade 11**

social and environmental responsibility (environmental issues that cause ill - health
*September 1, 2015*

**math**

Help I don't get math
*September 1, 2015*

**math **

For positive integers x and y, x+y=21. What is the smallest possible value of xy? a.10 b.20 c.38 d.54 e.110
*September 1, 2015*

**MAT 221**

If 6 pens cost d dollars, how much, in dollars does each cost.
*September 1, 2015*

**Math**

Would two coterminal angles for -13pi/6 be -25pi/6 and 11pi/6?
*September 1, 2015*

**math**

Three hundred ten million,seven hundred sixty three thousand one hundred thirty six. And the other is 20,000,000 + 400,000 + 80,000 + 4,000 + 100 + 60 + 3
*September 1, 2015*

**algebra**

How do you calculate the rate of 40 cars parked in 6 rows in a parking lot
*September 1, 2015*

**Chemistry**

Thank you for your help
*September 1, 2015*

**Chemistry**

ok so for wavelength I get 6.058x10^-7 then I divide: 2.998x10^8 / 6.058x10^-7 and get 4.949x10^14 Hz Is this correct?
*September 1, 2015*

**Chemistry**

Oh is it 1.816x10^2? I divide the speed of light by the wavelength: 2.998x10^8 / 1,650,763.73 I did the reverse the first time. Is this correct now?
*September 1, 2015*

**Chemistry (Please check my answer)**

I got 5.506x10^-3 when I divide the wavelength by the speed of light but I don't think that's right because Kr is an isotope. Could you please explain how this works too?
*September 1, 2015*

**Chemistry**

The meter has been defined as 1,650,763.73 wavelengths of the orange-red line of the emission spectrum of ^86Kr. Calculate the frequency of this radiation. In what proportion of the electromagnetic spectrum does the radiation fall?
*September 1, 2015*

**Pre-Calculus**

???
*September 1, 2015*

**Pre-Calculus **

focus at (-2,0) directrix the line x=2
*September 1, 2015*

**Science**

Then why are you on here?….EXACTLY….I am on here trying to help other students understand certain subjects and questions not just GIVE them the answers...
*September 1, 2015*

**Science**

If this is a test, you shouldn't be looking up answers!
*September 1, 2015*

**Science**

look, i just need one example you don't have to like that, and second this is on a test and just like you i don't have much time to be here all day
*September 1, 2015*

**Science**

Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life.
*September 1, 2015*

**Science**

Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life.
*September 1, 2015*

**P.E**

D is correct. *Just took the quiz. :)
*September 1, 2015*

**math**

5,10,20,40,__,___,___,___
*September 1, 2015*

**Algebra**

Write a algebraic equation Ron is 10 years younger than maria. If maria is 'n' years old, how old is Ron
*August 31, 2015*

**Chemistry**

Suppose that 2.091x10^-18 J is absorbed by the electron of a hydrogen atom in the n=1 energy state. Describe the final energy state of the atom.
*August 31, 2015*

**math**

660/60 = ft/s
*August 31, 2015*

**Chemistry**

How much energy in joules is required to change the energy state of the H-atom electron from n=2 to n=3? from n=2 to n=4? from n=2 to infinity? Kind of confused on this concept. Could you please explain for me? Thanks
*August 31, 2015*

**math**

Cherish planted 12 flowers. She put the same number of flowers in each row. Draw a picture to show how she planted her flowers. Write an addition sentence to match your problem
*August 31, 2015*

**noun**

Seconds
*August 31, 2015*

**Math**

Oh ok! Thank you
*August 31, 2015*

**Math**

100 milk cartons were put out for breakfast. At the end of breakfast ony 27 remained what is the ratio of milk cartons taken to total milk cartons
*August 31, 2015*

**Science**

i did and there was no help from it
*August 31, 2015*

**Science**

1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly.*** Scientists use models of natural systems because they like to use art in science. ...
*August 31, 2015*

**science**

1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. Scientists use models of natural systems because they like to use art in science. ...
*August 31, 2015*

**science**

1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. Scientists use models of natural systems because they like to use art in science. ...
*August 31, 2015*

**chem**

12.16 mL of 0.205 M thiosulfate are required to reach the endpoint in the titration of 2.26 g of bleach sample
*August 31, 2015*

**math accounts economics**

what job can I get with these subjects
*August 31, 2015*

**physic**

A 1.2-kilogram basketball travelling at 7.5 meters per second hits the back of a 12-kilogram wagon and bounces off a 3.8 meters per second, sending wagon off in the original direction of travel of the ball. How fast is the wagon going?
*August 31, 2015*

**Chemistry**

If the H-atom electron in the n=1 state absorbs energy equivalent to 2.178x10^-18 J, what energy state will it occupy?
*August 30, 2015*

**physics **

A system does 137 J of work on its environment and gains 95.3 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment
*August 30, 2015*