Chemistry
Oh and I don't think this is a Chemistry question.
Chemistry
because The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom. A day is how long the earth takes to rotate once and that in our time is 24 hours [well, 2...
math
I think it was a typo: it should be = 3 - 2(7) -2(-4y) = 3 - 14 + 8y = 8y - 11
Math/Algebra 2
2/x + 3/4x = 8/4x + 3/4x = 11/4x
alegbra
x^2-15x-36=-72 therefore x^2-15x+36=0 when you solve this you get (x-12)*(x-3)=0 You can find the 2 solutions from that and multiply them. hope that helps
Algebra 2
sorry, i made a mistake 8(x) + 5(2x) = 360 8 per truck, 5 per car
Algebra 2
here is a hint, if trucks = x then cars = 2x then x + 2x = $360 see if you can get the rest now. just write what they told you in equation for. hope that helps
math
multiply the 1st equation by -2 and then add them to get rid of the y's [and hence find the x] once you have the value of x sub it into either of the two equations to find y. then just do x-y Hope that helps
7th grade
for the 1st post - to dim for the 2nd post - adequate hope that helps
Algebra
vol = l*w*h the question is that l is doubled to give 2l h is doubled to give 2h and w is tripled to give 3h. so the new vol = (2l)*(2h)*(3w) = 12*l*w*h so 'new vol' = 12*old vol Hope that helps
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