Posts by John
Total # Posts: 8,751

Physics
80 x 41 x .129 wrong 80 x 41 x .03 wrong Thanks 
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. 
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 
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? 
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? 
Physics
Thanks much. This is what I needed to understand. 
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... 
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. 
Sociology
If you could make changes with regard to our social class stratification system, what changes would you make and why? 
Math
Sove the inequality x+2/4x+1/3>1/2 
math
(7,000)(20,000) write in scienfic notation 
calculus
haha is this for 16a?? same question :P 
english
The of broken glass followed the of the bullet as the rifle . The soldiers were awakened by the of the bugle 
Algebra
D = independent variable P = dependent variable 3d+9p=x 
Math
6 
Math
The difference of a number and its opposite is 28. Find the number 
Chem
mass of hydrogen/mass of compound times 100 to get % 
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 ... 
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? 
Math, Please Help
I just did this above. 
Algebra
fee = flat rate + ___ per mile times miles. You need to find a current rate using the internet. repla 
Math
The e is supposed to be theta. 
Math
Given that tanè = 5 and è is in the 2nd quadrant, compute exactly: A. sin(è) B. cos(è) C. tan(2è) 
math
The widths of two similar rectangles are 16 cm and 14 cm. What is the ratio of their perimeters? Of their areas? 
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 ... 
Math
(72 +x)/2 =81 Multiply both sides by 2 and subtract 72 to get ... 81(2)72 
science
KE = 1/2 mv^2 1/2 his mass times velocity squared. 
Math
What? 
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 yintercepts on your graph. Label the asymptotes and intercepts. Part 2. Show ... 
Science
d = rt d = 100 times 64 answer is in km. 
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. 
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. 
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 
mathematics
30 4010 (4010)^2 = 40^2 2(40)(10) + 10^2 Can you finish from here? 
Math
I agree with D. 
PreCal: 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 ... 
basic science
work = force x distance Multiply the two values. 
math/algebra
ratio (2(lw+wh+lh)/lwh 
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? 
Math
5 times 24 divided by 6. 
Biostatics
4548 divided by 3 1 = z score find z< 1 use a ztable or a calculator to find the pvalue which is 15.9% 
Science
change in y / change in x (24)/(31) or (2+4)/(31) 6/2 = 3 that is the slope of the line. Now, you can find the equation y 2 = 2(x3) simplify and finish. Leave your answer in ax+by = c or y = mx+b form. 
Math (Circle Equations)
I agree. I would just write 2^2 as 4. 
Math help plz??
I'm not right, I'm just so ugly, I want to ruin other students life's. So plz, I'm just the worst!!!!!!!!! 
th help plz??
(3.54 x 10^7) divided by (3.00 x 10^8) divide 3.54 by 3.00 = 1.18 10^78 = 10^1 1.18 x 10^1 
PreCalculus
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. 
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? 
math143
Find the way intercepts for 4y5x=18 
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. 
math143
2x34x2+23=y A.is(4,167) a solution? Show/explain b.is(3,51) a point on the graph c.give the yintercept 
physics
what is the frequency of unknown fork if 8 beats in 8 seconds are heard with each fork 
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? 
math
You need to subtract 144 from each side and not add it. So.. I still agree with your answer. 
math
I agree. 
statistics
(100110)/25 = z = .4 (110110)/25 = z = 0 you want to find the probability between .4 and 0 you can look this up using a ztable or a calculator. I go .155 See if you agree. 
math
Hi, I posted a question yesterday. How do I get to see if someone answered? Thanks, John 
math
what is the current value of a pension of $ 200.00 per month for the next 15 years? 
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? 
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 
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 
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 
math
Sara is lining a square tray with 1inch tiles. The side length of the tray is 9inches. How many tiles does Sara need? 
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? 
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 ... 
math
RS = AB x = 2x + 7 x = 7 
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 yaxis at (0,2) It should cross the xaxis at (2/3, 0) Hope this helps. 
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. 
math
alright thanks 
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 
Math ms sue??? (Check my answers????)
Ok i figured out some that i got wrong but i'll that 
Math ms sue??? (Check my answers????)
You don't know if I got any right? 
Math ms sue??? (Check my answers????)
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) ... 
math grade 9
only 1 out of the 11? 
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 ... 
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. 
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. ... 
math
A picture is copied onto a sheet of paper 8 inches by 10 inches. A 2inch 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? 
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 
Algebra II
.60 less than 75000 .40 more .65 air condition .30 air .60 times .65 low and air .65 + .30 have working air 
Algerbra
You really need to know how to do the problems. Copying answers doesn't help you at all in the end. 
math
104 + .22(104) 120 .25(120) 
Please help me with this math
3x + 5 <or = 22 Subtract 5 from both sides. Divide both sides by 3 When you divide by a negative, you have to switch the inequality which will give you > or equal to 
Math Prob Stat
p=.35 q =.65 .35^5 times .65^11 =_____ then you have to multiply that answer by the combination that gets you 16!/11!5! you do that because there are many ways to get those 5 people. It could be the first 5, the last 5, the middle 5 or any possible. b) .35^11 times .65^5 and ... 
Math
To be even, you have to be divisible by 2. x/2 + y/2 =( x + y)/2 even numbers have a difference of 2. n + n + 2 = 2n +2 which is divisible by 2 or something like n+2 + n+4 = 2n+6 again divisible by 2. 
Math
tan 60deg = y/x y/x =1.7325 tan 30 deg = y/(x + 6) = .577 x = shadow and y = pole y = 1.7325x y = .577(x +6) Since they both equal y, you can say.. 1.7325x = .577x + 3.462 Solve for x to get the shadow for the 60 degrees. Find y, by putting this answer into both equations. If ... 
Math
16 =k2 as one increases, the other increases. As one decreases, the other decreases. k = 8 y=8x 
Math
f(x) = x + 2 the higher number you put in the higher answer you get. Think about x = 2 vs. x = 200 
Statistics
.12 times .96 false positive times % who don't have the disease. 
Algebra
C = 2605 + (25005/28)x 
science
Net force is 5 because one side is pushing by 5 more newtons. 
Math
x = y 
itttech
In Newtons: 7000 x 9.8 
Algebra
For lines to be parallel, they have to have the same slope. (7  (2))/ 5 7 9/2 = m (1,3) Use the slope and the point to find the equation. There are many ways to do this. One is called the point slope formula: y  3 = (9/2)(x 1) simplify and solve for y. 
algebra
8000(1+.03)^4 Raise 1.03 to the 4th power and then multiply times $8000. 
Algebra
If two lines are perpendicular their slopes or gradients are negative reciprocals of each other: 5 1/5 4 1/4 1/2 2 do you see the idea? Also the two gradients will multiply to equal 1. You can use that as a check. 
Financial Math
4 numbers 2 letters (09) (26) (10^4)(26^2) 
math
It depreciates $2500 per year. After it is x years old, it has depreciated 2500x. 
CHECK MY WORLD HISTORY ANSWERS
5 is glass ceiling 9 native treaty rights All the others are correct. 
MATHS
Not if the first is a negative. 5 and 7 =2 1/2 + 3/4 = 2/4+3/4= 1/4 2 1/4 
math
you are right