Tuesday

September 27, 2016
Total # Posts: 7,972

**Math**

-1/2 + 2 = 1 1/2

*August 17, 2016*

**physics**

calculate the escape velocity of a satellite from the earth's gravitational field,if the radius of the earth is 6.4×10^6m

*August 17, 2016*

**Science**

I like 1.

*August 15, 2016*

**Math**

.72 would be 72/100 if repeating 72/99 always create the non repeating and subtract 1 from the denom. now reduce 72/99 to 8/11

*August 15, 2016*

**Math**

A = K cube root 8 divided by 2/3 A = K 2 times 3/2 A =2k K stands for a constant. I don't know if your teacher wants A= 2 or 2K for the answer.

*August 15, 2016*

**math**

1/3(10t + u ) = t + u + 1 3t = u 1/3 (10t + 3t) =t + 3t +1 1/3 13t = 4t + 1 13t = 12t + 3 t = 3 u = 9 check: 1/3(39) = 3 + 9 + 1 yes 13 = 13

*August 15, 2016*

**Math**

nicely

*August 13, 2016*

**probability**

John hs 3 red markers and 5 blue markers. What is the probability that he picks a red marker, and then, without replacing it, selects another red marker? Please show me how to set this up (you don't have to give me the answer)...thank you

*August 10, 2016*

**math**

I agree

*August 10, 2016*

**physics**

A cm^3 is a block that is a cm x cm x cm. If you have a piece of gold that is that size. 1 cm x 1cm x 1cm then it will have a mass of 19.6 grams. Just another note a cubic cm is also equal to a milliliter.

*July 31, 2016*

**Chemistry**

If 0.896g of a gas occupies a 250mL flask at 20 degree celcius and 760 mmHg of pressure, what is the molar mass of the gas?

*July 27, 2016*

**Math**

5 units to the left because you are going from a -2 to a 3 which is a difference of 5.

*July 26, 2016*

**Statistics**

Question was 15 years or more.. so the answer is 41.9% or 42%

*July 26, 2016*

**Math **

The average age of Ali,Ben and Chandra is 10 years.Ali is 3 years older than Ben.Ben is 6 years older than Chandra.how old is Chandra

*July 21, 2016*

**Physics or Math**

Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? what's the formula pls?

*July 21, 2016*

**Physics**

Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? What's the formula?

*July 21, 2016*

**Physics**

Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? What's the Formula pls? Thanks

*July 21, 2016*

**Physics**

Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling?

*July 21, 2016*

**College Chem.**

A scientist adds 1.00 moles of phosphoric acid to a liter of water to make a solution. How many moles of NaOH should be added to ensure that the concentration of H2PO4- is equal to three times the concentration of HPO42? Remember that H3PO4 is a triprotic acid. I don't ...

*July 21, 2016*

**statistics**

Break even is when R(x) =C(x) 200x - x^2 =70x +2200 0 = x^2 -130x +2200 Factor (x-110)(x-20) = 0 x = 110 or x =20 Given the values of x stated above. Your only possible answer is 20.

*July 20, 2016*

**mathematics**

There are 7 days in a week. 1/7 chance that today is Tuesday. If today is Tuesday then we have a probability of 1 that tomorrow is Wednesday. 1/7 times 1 = 1/7

*July 20, 2016*

**math**

n = 1st n+1 = 2nd n+2 = 3rd n+n+1+n+2 = 18 3n + 3 = 18 Can you find n? Once you substitute the number for n to find the three numbers listed above. Then add them up to be sure that they do add to 18.

*July 20, 2016*

**Algebra**

sugar 3 1/4 cups = 13/4 cups Multiply 13/4 times 3/8 (13 x 3)/(4 x 8) leave in simplest form. Most likely you should convert back to a mixed number. flour triple batch means to multiply by 3 2 3/5 cups = 13/5 multiply by 3/1 39/5 = changed back to a mixed number.

*July 20, 2016*

**Math**

x^-1/4 = 4^-1/2, what is the value of q?^ raise both sides to the - 4th power multiply - 1/4 times -4 = 1 multiply -1/2 times -4 = 2 x = 4^2 x = 16 Now you can find q.

*July 19, 2016*

**Sociology**

Conflict theory :) Now, all I have to do is explain how it is that way.

*July 17, 2016*

**Sociology**

Would the factory workers be under the conflict or functionalism theory?

*July 17, 2016*

**Sociology**

I'm doing a discussion board on Apple iPhones and how harsh the work conditions are for their employees. I'm trying to tie that all together into my sociology class.

*July 17, 2016*

**Math**

The shorter edges of a 36 cm x 20 cm metalsheet are joined to form the vertical surfaces of a square base prism. What is the volume of the prism? what is the area of metal sheet required to make the top and the bottom of the prism.

*July 17, 2016*

**statistics**

A basketball player makes 60% of the free throws that he attempts, except that if he has just tried and missed a free throw then his chances of making a second one go down to only 30%. Suppose he has just been awarded two free throws. Find the probability that he makes both. ...

*July 16, 2016*

**Algebra 2**

thanks scott

*July 15, 2016*

**Algebra 2**

Lines x + y = 12 , x + y = 12. Are they parallel or other? is it parallel?

*July 15, 2016*

**maths**

A(–4, 3), B(3, 7), C(0, –1) and D(–7, –5) are the vertices of a parallelogram on the Cartesian plane. Determine the coordinates of the point where the diagonals of ABCD intersect.

*July 15, 2016*

**Algebra 2**

thanks steve

*July 15, 2016*

**Algebra 2**

how can u tell if a equation is liner?

*July 15, 2016*

**Physics**

100 - (80m/sec times 20 sec)

*July 10, 2016*

**Physics**

An astronaut constructs a pendulum with a length of 1 meter on a new planet. If the period is 3.9 second, what is the acceleration due to gravity? Can someone help me with formulas to determine this?

*July 9, 2016*

**Physics**

80 x 41 x .129 wrong 80 x 41 x .03 wrong Thanks

*July 6, 2016*

**Physics**

I understand the formula. I haven't been able to get a correct answer. I don't know what I'm doing wrong. Thanks though.

*July 6, 2016*

**Physics**

How many calories will it take to raise the temperature of a 41 g gold chain from 20°C to 100°C? The answer is 102 calories. I've tried everything and can't come up with that answer. Does someone have any idea what was used for a formula? Thanks

*July 6, 2016*

**Math (Quadratic Equations)**

Two pipes that are open at the same time can fill a pool in 12 hours. When only Pipe A is open, it can fill the pool 7 hours longer than when only Pipe B is open. Find how long Pipe A can fill the pool when it is the only pipe open?

*July 6, 2016*

**Physics**

I've tried everything and can't come up with the correct answer. Help! A liter of water has a mass of 1 kg and the mass of a water molecule is 18 amu. How many molecules of water are there in 4 L of water?

*July 3, 2016*

**Physics**

Thanks much. This is what I needed to understand.

*July 3, 2016*

**Physics**

I don't understand your question, however here are other parts of the same question and the answers are correct. All on the same 1 meter stick. Assuming g=10m/s/s: 500g weight on the right end of the stick; torque = 5 Nm. 750g weight on the right end of the stick; torque...

*July 3, 2016*

**Physics**

Find the torque on the meter stick for each situation. Ignore the mass of the meter stick. At 1/2 meter there is a 1000g weight. At 1 meter on the same stick there is a 500g weight. What is the torque? Not understanding how to come up with this answer. Keep getting it wrong.

*July 3, 2016*

**Sociology**

If you could make changes with regard to our social class stratification system, what changes would you make and why?

*July 3, 2016*

**Math**

Sove the inequality x+2/4-x+1/3>1/2

*July 1, 2016*

**math**

(7,000)(20,000) write in scienfic notation

*July 1, 2016*

**calculus**

haha is this for 16a?? same question :P

*June 29, 2016*

**english**

The of broken glass followed the of the bullet as the rifle . The soldiers were awakened by the of the bugle

*June 26, 2016*

**Algebra**

D = independent variable P = dependent variable 3d+9p=x

*June 25, 2016*

**Math**

The difference of a number and its opposite is 28. Find the number

*June 21, 2016*

**Chem**

mass of hydrogen/mass of compound times 100 to get %

*June 19, 2016*

**Math**

A large standard deviation occurs when the data has a large spread of data points. This might happen with the heights of students in grades K - 12 A small standard deviation might be the heights of students in grade K. b) will have both larger prize amounts than a and smaller ...

*June 19, 2016*

**Math**

x + y =20 5x -1y =70 x = # correct y + # wrong. add the two equations together since the y's will cancel. 6x = 90 x = 15 correct how many are wrong?

*June 19, 2016*

**Math, Please Help**

I just did this above.

*June 19, 2016*

**Algebra**

fee = flat rate + ___ per mile times miles. You need to find a current rate using the internet. repla

*June 19, 2016*

**Math**

The e is supposed to be theta.

*June 17, 2016*

**Math**

Given that tanè = -5 and è is in the 2nd quadrant, compute exactly: A. sin(è) B. cos(è) C. tan(2è)

*June 17, 2016*

**math**

The widths of two similar rectangles are 16 cm and 14 cm. What is the ratio of their perimeters? Of their areas?

*June 16, 2016*

**Math**

36 km/hr times 1 hr/3600 sec I used 3600 because there are 60 min in 1 hour and 60 sec in 1 min. 36 km/3600 sec times 10 sec 360/3600 = he would be 1/10 or .1 km The tortoise takes 2 hours to go 1 km rate is .5 km/ hour chance to kim/sec .5/3600 tortoise'rate He has to ...

*June 12, 2016*

**Math**

(72 +x)/2 =81 Multiply both sides by 2 and subtract 72 to get ... 81(2)-72

*June 11, 2016*

**science**

KE = 1/2 mv^2 1/2 his mass times velocity squared.

*June 11, 2016*

**Math**

What?

*June 9, 2016*

**Math**

Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and intercepts. Part 2. Show ...

*June 9, 2016*

**Science**

d = rt d = 100 times 64 answer is in km.

*June 9, 2016*

**mathematics**

That is the answer, but your teacher might not want to see the word "squared" written. I just did that for you for clarity.

*June 9, 2016*

**mathematics**

Your teacher wants you to check that (x − y)^2 = x^2 − 2xy + y^2 We showed that 900= 900 It was a lot of work, but proved the equation works.

*June 9, 2016*

**mathematics**

30 squared = 900 Now, look at the other side of the equation. 40 squared = 1600 2(40)(10) = 800 10 squared = 100 1600 - 800 + 100 = 900

*June 9, 2016*

**mathematics**

30 40-10 (40-10)^2 = 40^2 -2(40)(10) + 10^2 Can you finish from here?

*June 9, 2016*

**Math**

I agree with D.

*June 9, 2016*

**Pre-Cal: Domain**

The denominator cannot = 0 For f(x) x cannot = 0 for g(x) x cannot = -7 1) If you add the two fractions together, the denominator will be x(x+7) Domain would be from (-infinity, -7)U(-7,0)U(0,infinity) Using ( ) because those values aren't included in the domain. 3) you ...

*June 9, 2016*

**basic science**

work = force x distance Multiply the two values.

*June 9, 2016*

**math/algebra**

ratio (2(lw+wh+lh)/lwh

*June 9, 2016*

**physics**

A large aquarium has viewing ports so people can watch dolphins swim by. What is the net force on a rectangular window, 2.30 m wide and 1.20 m high, if the top of the window is 4.50 m below the surface of the water?

*June 9, 2016*

**Math**

5 times 24 divided by 6.

*June 8, 2016*

**Biostatics**

45-48 divided by 3 -1 = z score find z< -1 use a z-table or a calculator to find the p-value which is 15.9%

*June 8, 2016*

**Science**

change in y / change in x (2--4)/(3-1) or (2+4)/(3-1) 6/2 = 3 that is the slope of the line. Now, you can find the equation y -2 = 2(x-3) simplify and finish. Leave your answer in ax+by = c or y = mx+b form.

*June 7, 2016*

**Math (Circle Equations)**

I agree. I would just write 2^2 as 4.

*June 7, 2016*

**th help plz??**

(3.54 x 10^7) divided by (3.00 x 10^8) divide 3.54 by 3.00 = 1.18 10^7-8 = 10^-1 1.18 x 10^-1

*June 7, 2016*

**Pre-Calculus**

With linear programming, you have to graph each of the equations. x<=y also is needed along with your other equations. Shade in the correct area for the inequalities and look at your intersection points.

*June 7, 2016*

**math143**

Are you looking for the x and the y intercepts? if so, let x = 0 and solve for y let y = 0 and solve for x. 4y = 18 -5x = 18 Can you finish from here?

*June 7, 2016*

**math143**

Find the way intercepts for 4y-5x=18

*June 7, 2016*

**math143**

A. Substitute those values into the equation, simplify does the left side = -167 b. again, put both values into the equation. Does the left side = 51, if so.. it is a point on the graph. to find the y intercept. Let x = 0 and solve for y.

*June 7, 2016*

**math143**

2x3-4x2+23=y A.is(-4,-167) a solution? Show/explain b.is(3,51) a point on the graph c.give the y-intercept

*June 7, 2016*

**physics**

what is the frequency of unknown fork if 8 beats in 8 seconds are heard with each fork

*June 4, 2016*

**Math**

Two boats leave the same place at the same time. The first sails in a straight line N70°W at 45 miles per hour and the second goes in a straight line S23°E at 57 miles per hour. After 1 hour, how far apart are the boats, to the nearest tenth of a mile?

*June 4, 2016*

**math**

You need to subtract 144 from each side and not add it. So.. I still agree with your answer.

*June 3, 2016*

**math**

I agree.

*June 3, 2016*

**statistics**

(100-110)/25 = z = -.4 (110-110)/25 = z = 0 you want to find the probability between -.4 and 0 you can look this up using a z-table or a calculator. I go .155 See if you agree.

*June 3, 2016*

**math**

Hi, I posted a question yesterday. How do I get to see if someone answered? Thanks, John

*June 3, 2016*

**math**

what is the current value of a pension of $ 200.00 per month for the next 15 years?

*June 3, 2016*

**Math**

Start with the idea that there are 180 degrees in a triangle and that angles w and x are supplementary which means they sum to 180 180 = w + x 180 = x + y + z Can you finish it now?

*June 2, 2016*

**math**

m = -14 -.4 divided by -5 -4 -14/4/-9 14.4/9 = m y+14 = (14.4/9)(x+5) the equation will be in y=mx + b form and you can change it to Ax+By =C

*June 1, 2016*

**math**

2) 8 fours out of 20 8/20 = 2/5 = .4 3) A part of the question is missing. 4) .15 times 20 will get your answer. 5) .2 times 50 6) 5/600 times 24000 7) I agree 8) 4/10 times 3/10

*June 1, 2016*

**math**

1) I am getting 30/50 for P(not red) so I disagree with your answer. 9) Write out your table: HHH HHT HTT HTH THH THT TTH TTT It looks like HHH and HTH appear once each. 10) 1/2 chance of a heads 4/6 to get a number less than 5 multiple the two to get 4/12 or 2/3

*June 1, 2016*

**math**

Sara is lining a square tray with 1inch tiles. The side length of the tray is 9inches. How many tiles does Sara need?

*May 31, 2016*

**physics**

You are standing 5 feet from one speaker and 14 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is barely audible at your location, which of the following could be the wavelength of the sound?

*May 31, 2016*

**probability**

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 You have 21 numbers Which of these numbers are divisible by 5 or 3 5,6,12,15,18,20,21,24,25 9/21 or a decimal if your teacher requires that format. b) count up the even numbers and the prime numbers. Prime numbers are ...

*May 31, 2016*

**math**

RS = AB x = 2x + 7 x = -7

*May 29, 2016*