Saturday
July 30, 2016

Posts by alfonso

Total # Posts: 8

Discrete math
TRUE OR FALSE ? Justify your answer. a. There exist real numbers a and b such (a+b)^2 = a^2 + b^2. b. For any real number x, there exists a unique number -x such that x + (-x) = 0. c. Any integer n is either odd or even. d. Any real number x can be written as a fraction. Write...
March 3, 2016

Math
TRUE OR FALSE ? Justify your answer. a. There exist real numbers a and b such (a+b)^2 = a^2 + b^2. b. For any real number x, there exists a unique number -x such that x + (-x) = 0. c. Any integer n is either odd or even. d. Any real number x can be written as a fraction.
March 3, 2016

Physics
Many people mistakenly believe that the astronauts who orbit the Earth are "above gravity." Calculate g for space shuttle territory, 290 kilometers above the Earth's surface (dashed line in sketch). Earth's mass is 6 1024 kg, and its radius is 6.38 106 m (...
October 5, 2013

Physics
Surprisingly, very few athletes can jump more than 2.7 ft (0.82 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 0.82 m vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground. Can you ...
September 14, 2013

math
Which of the following statements is true? A. all trapezoids are similar B.all isosceles triangles are the same C.all rectangles are similar D.all equilateral triangles are similar
December 6, 2012

math
find the following landmarks for this set to numbers 12,16,23,15,16,19,18
October 15, 2012

algebra
formula= P(x)=.1x^2+50x-300 where x is number sold what is ans. if P(100)=.1(100)^2+50(50)-300
October 26, 2011

bio
how does a Dichotomous Key work. Thank you for using the Jiskha Homework Help Forum. Be sure to visit the following sites: 1. http://students.ed.qut.edu.au/n2364379/MDB377/DichotomousKey.html 2. (Broken Link Removed) 3. http://www.enchantedlearning.com/subjects/plants/activity...
July 24, 2007

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