Saturday
July 23, 2016

Posts by John

Total # Posts: 7,840

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
-6
June 22, 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

Algebra Help
Graph c should have a line that is slanting downward from left to right. y = -3x + 2 or 3x + y = 2 It should cross the y-axis at (0,2) It should cross the x-axis at (2/3, 0) Hope this helps.
May 27, 2016

Algebra
9 times 10^4 multiplied 8 times 10^6 multiply 9 times 8 = 72 with exponents you keep the base and add the exponents. 72 times 10^10 sci notation calls for one decimal place only 7.2 times 10^11 You have your exponent right, but didn't multiply the coefficients.
May 27, 2016

math
alright thanks
May 26, 2016

math
A line connecting the points (x, 12) and (12, 9) has a slope 1.4. Determine X. a. 9 b. 10 c. 7 d. 8 Steepest slope? a. 0.4 b. undefined c. 0.1 d. -1 over 7 Flattest slope? a. 7 over 9 b. 0 (THIS ONE) c. undefined d. 2 over 3
May 26, 2016

Math ms sue??? (Check my anwsers????)
Ok i figured out some that i got wrong but i'll that
May 26, 2016

Math ms sue??? (Check my anwsers????)
You dont know if I got any right?
May 26, 2016

Math ms sue??? (Check my anwsers????)
1) What would the slope be for a road that has a rise of 11m and a run of 100m? a. 22 over 100 b. 11 over 100 (THS ONE) c. 15 over 100 d. 30 over 100 2) What would the slope be for a road that has a rise of 5m and a run of 100m? a. 0.05 (THIS ONE) b. 0.25 c. 0.16 d. 0.02 3) ...
May 26, 2016

math grade 9
only 1 out of the 11?
May 26, 2016

math grade 9
can someone check over my answers and correct them? *over means fraction 1) What would the slope be for a road that has a rise of 11m and a run of 100m? a. 22 over 100 b. 11 over 100 (THS ONE) c. 15 over 100 d. 30 over 100 2) What would the slope be for a road that has a rise ...
May 26, 2016

algebra 1
$300 is what they will take in. How much is the prize? I need that to find expected value for Raul. The fair price of a ticket depends on the pay out.
May 25, 2016

algebra
You need a VENN diagram to answer this question with circles for mysteries, sci fi and romance. They will all intersect and there will be a triple intersection in the middle with "3" Then you work back to the double intersections... subtracting 3 from each of those. ...
May 25, 2016

math
A picture is copied onto a sheet of paper 8 inches by 10 inches. A 2-inch margin is left all around the picture. Find the length, width, and area of the picture. Length = 10 inches Width = 8 inches Area = 80 inches squared am i right?
May 25, 2016

Algebra II
one leg is 5 sqrt 3 the other leg is x the hypotenuse is x + 2 c^2 = a^2 + b^2 (x+2)^2 = x^2 + (5 rt3)^2 x^2 + 4x + 4 = x^2 + 75 4x + 4 =75 because the x^2 cancel. Can you solve from here
May 25, 2016

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