math
how would you solve these equations? y^2+2y-2x+5=0 and (x^2/16)-(y+1)^2/(25)=1 thank you!
science
Whats a good reason for dissecting a heart and what would be the purpose?
chemistry
given 14g silver oxide, how much silver can be made?
stats
use technology to find the P-value for a two tailed test with n=28 and a test statistic t=2.032 P-value =???? Help please! i dont understand this
math
Thanks. So no matter what the times I have to subtract the starting time from the ending time - right?
math
if a game is started at 7:48am and finishes at 10:58am ... how do I figure how many hours and minutes it took to finish the game?
Statistics
A certian company enjoyed 3.5% profits in year 1 over its revenue in Year 0. In Year 2, it enjoyed 5.75% profits over Year 1. In Year 3, it posted 1.25% profits over Year 2. What single, constant profit over this period of years would have produced the same profit? The teacher...
physics
A particular guitar string is supposed to vibrate at 192 Hz, but it is measured to actually vibrate at 212 Hz. By what percent should the tension in the string be changed to get the frequency to the correct value?
Chemistry HELP!!
A sample of nicotine weighing 0.3204 g was vaporized in a flask with a volume of 487 mL. This sample exrted pressure of 74.3 mm Hg at 20 degrees C. What is the molar mass of nicotine? I know this has to do with N=P*V/R*T. and 1 atm=760 mm Hg. Please help and show work. chemist...
Chemistry
so then would i take: .284 L/44 g/mol =.006 then .006*100 g/mol =.645 then take .645/1.506 = .429 ---->.429 * 100 = 42.9% is this how i would get the answer?
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