Tuesday
August 30, 2016

Posts by JOHN

Total # Posts: 7,878

Algebra
multiply everything by 3x (3x)(5x) + 6 -9(3x) = 7x 15x^2 + 6 -27x =7x 15x^2 -34x +6 =0 Use the quadratic to solve.
August 29, 2016

Math
Write an expression for 25 less than double a number n
August 25, 2016

physics
A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp. ...
August 24, 2016

physics vectors
While exploring a cave, a spelunker starts at the entrance and moves the following distances. She goes 75.0 m north, 250 m east, 109 m at an angle θ = 30.0° north of east, and 156 m south. Find the resultant displacement from the cave entrance. The figure below ...
August 24, 2016

physics vectors
A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp. ...
August 24, 2016

physics vectors
In the figure below, a spider is resting after starting to spin its web. The gravitational force on the spider is 0.158 N on the junction of the three strands of silk. The junction is supported by different tension forces in the two strands above it so that the resultant force...
August 24, 2016

physics vectors
If vector A = (6.00 i -8.00 j) units, vector B = (-8.00 i + 3.00 j) units, and vector C = (25.0 i + 22.0 j) units, determine a and b such that (a vector A + b vector B + vector C= 0.) a=? b=?
August 24, 2016

math
A plane flew due south from a point A, 60°north and 45°east to a point B.The distance covered by the plane was 8000km. Determine the position of B.
August 24, 2016

physics vectors
A snow-covered ski slope makes an angle of θslope = 34.0° with the horizontal. When a ski jumper plummets onto the hill, a parcel of splashed snow is thrown up to a maximum displacement of 1.10 m at θsnow = 24.0° from the vertical in the uphill direction as ...
August 23, 2016

physics vectors
Consider the two vectors A with arrow = 3 i − j and B with arrow = − i − 6 j. Calculate the directions of A with arrow + B with arrow and A with arrow − B with arrow. A with arrow + B with arrow ° (counterclockwise from the +x axis) A with arrow &#...
August 23, 2016

physics
A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp. ...
August 23, 2016

physics vectors
i don't understand the direction
August 23, 2016

science
While exploring a cave, a spelunker starts at the entrance and moves the following distances. She goes 75.0 m north, 250 m east, 109 m at an angle θ = 30.0° north of east, and 156 m south. Find the resultant displacement from the cave entrance. The figure below ...
August 23, 2016

Math
Change the next 3 numbers
August 23, 2016

Math
How do you compare whole numbers through the millions?
August 23, 2016

Social Studies PLEASE HELP!
How does the US regulate the gathering/use of wood? I am working on a school project, I am supposed to research, I looked everywhere in my textbook and online and couldn't find anything. Can anyone help me?
August 23, 2016

World History
b
August 23, 2016

Algebra
Not sure why I thought I wasn't able to divide 32.4k by 9.9 Anyways, thank you for the help, my answer came out to 3.98 (rounded up)
August 22, 2016

Algebra
Need some help with this question 65.9 - 32.4k/9.9 = 13.3k / stands for a fraction bar
August 22, 2016

Math
This is a long division problem Divide 24 into 576020 When you get to a number less than 24 that is the amount that will be donated.
August 19, 2016

Math
I think you meant all 3 pillows. 4 inches times 4 sides = 16 inches then 16 inches time 3 pillow = 48 inches
August 18, 2016

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
-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

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