Chem
why is (NH4)2Cr2O7 >> N2 + Cr2O3 + 4 H2O balanced like this.
Decimal division
If you were going to solve 0.7 divided by 0.0035 what would you write down on paper step by step?
Physics
How long does it take a motor cyclist to come to rest?which travels at 12m/s decelerates at 3m/s^2
math
Q: Convert 4x^2 + 4y^2 -8x -16y -29 = 0 into standard form. I first started by pairing the like terms together, getting: 4x^2 -8x + 4y^2 -16y = 29 The next step, I'm a little confused. I know I need to complete the square, but I'm not sure how to fully factor out the a...
Algebra II
Working on my online math homework, I encountered this problem: Solve: (3x^-1 y^-2)^-2 (x^2 y^5)^-1 [[Spaces denote the end of the exponent.]] Because of the law of exponents that deals with negative exponents, I did the reciprocal and distributed the exponent, getting (1/3x^2...
trig
how do you work find sin (a-B)beta sign. sin a = 12/13,a lies in quadrant II,and cos B = 15/17, B lies in quadrant I.
statistics
in a class of 40 student,18 pass maths, 19 pass account,16 pass economics 5 pass maths and account only, 6 pass maths only, if each student pass at least one of the subject.find the percentage number who fail in at least one of economics and maths. how many student fail in all...
5 ways in which the human or environmental problem impact on the community
I don't know the answer so I need help
U.S history
Describe America’s economic and military role in WW1
U.S history
World War 1
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