HELPPP!! math
cross multiply http://www.mathsisfun.com/algebra/cross-multiply.html
algebra
http://www.purplemath.com/modules/strtlneq.htm
Chemistry
P1V1/T1 = P2V2/T2
Chemistry
Here's the equation: Na + Cl2 -> NaCl Balance the equation yourself. stoichiometry: http://www.jiskha.com/science/chemistry/stoichiometry.html
Geometry
Volume of a cylinder = pi*(r^2)*h r=h http://math.about.com/od/formulas/ss/surfaceareavol_3.htm Substitute r for h and solve for h, which is also equal to r. Then, substitute the values into the equation of volume of a cone. volume of a cone= 1/3 pi*(r^2)*h http://math.about.c...
geometry
volume of a square pyramid = 1/3 * b^2 * h http://math.about.com/od/formulas/ss/surfaceareavol_5.htm find h.
mathematics
prime factorization http://www.mathsisfun.com/prime-factorization.html
Math
Area = L*W
Math
L = 11x W = 7x W = L - 20 Substitute 11x and 7x for L and W: 7x = 11x - 20 Solve for x and plug in the following to solve for length and width. L = 11x W = 7x
statistics
total balls = 10 without replacement, so you'll have one less ball each time you draw I'll do the first one for you. You can figure out how to the rest. P(both black) = (6/10)(5/9) Explanation: During the first draw, there are 6 black balls and a total of 10 balls. Dur...
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