in parallelogram abcd, diagonals ac and bd intersect at e. AE=3x-4, and EC=x+12. what is the value of x? i believe that x=8. i set them as equal and i minus x from 3x and 4 from 12. is this right?
April 6, 2009
Solve the problem. An open box is to be made from a rectangular piece of tin by cutting two inch squares out of the corners and folding up the sides. The volume of the box will be 100 cubic inches. Find the dimensions of the rectangular piece of tin.
March 21, 2009
Solve the problem. Round to the nearest tenth, if necessary. A rock falls from a tower that is 432 feet high. As it is falling, its height is given by the formula h = 432 - 16t2. How many seconds will it take for the rock to hit the ground (h=0)?
March 21, 2009
evaluate the indefinite integral: x^13(cos(x^7))dx I've tried using integration by parts but I haven't ssem to be getting the right answer. I've used u=x^13 and dv=cos(x^7) and vice versa... much help is appreciated
February 26, 2009
Mr.Daly is running short on cash and needs to gas up his car. After filling his car up at the local gas station he takes off without paying. He is put on trial and somehow (miraculously for Mr. Daly) he is found innocent. The prosecution finds new evidence that will surely ...
January 16, 2009
complete the table that shows the length of the chain formed when rings are liked in a staright line 1)number of rings 1 length of chain 16mm 2)number of rings 2 length of chain 30m 3)number of rings 3 length of chain 44m 4)number of rings 6 length of chain ( ) 5)number of ...
May 19, 2008
Please calculate the solubility of calcium sulfate in 0.010 mol/L calcium nitrate at SATP. This very question has been bugging me all weekend. Can some one please solve this quesiton it would really be appreciated.
March 30, 2008
Calculate the solubility of zinc hydroxide at 25 °C. The Ksp of Zn(OH)2(s) is 4.5 x 10^-17 at 25 °C? What did I do wrong? Zn(OH)2 <----> Zn2+ + 2 OH- let x = moles/L of Zn(OH)2 that dissolve. This gives us x moles/L of Zn2+ and 2x moles / L of OH- [Zn2+] = x [OH...
March 30, 2008
The circumference of the base of a cylinder is 16 cm. The height of the cylinder is 10cm. a. What is the surface area of the cylinder? b. What is the volume of the cylinder? Need help on this one. I have the formula but I'm a little confused because I don't know what ...
February 21, 2008
Who is a jounalist responsible to, they're employer or the viewing public? I also need particular examples of when news has been withheld for the good of the public or vice-versa for profit/ratings. if you can help then thanks :-)
November 15, 2007
I need names of twenty famous people in world history, who are not americans. Here is web site that will not get 20 but will get close. The disadvantage is that all of them are from or lived in a small town AND it was years ago. You may want newer faces. You can add the names ...
October 14, 2006
4th Grade math
Solve. I have no digits the same. My thousands digit is less than my tens digit. My hundreds digit is twice my ones digit. If you add my digits, the sum would be 25. Who could I be? Could I be 2 numbers? We can not figure this out. Can someone help please. Let's find out ...
September 7, 2006