8km / 3cm * 11 cm = 29 1/3 cm ( see how the units cm cancel out and you are left with 'km' ?
From a Periodic Table
carbon weighs ~ 12 gm/mole
oxygen weighs ~ 16 gm/mole
so CO2 weighs 44 gm/mole
214 kg = 214 000 gm
214 000 gm / 44gm / mole = 4863.6 moles
4863.6 moles * 6.02 x 1023 particles/mole = 2.928 x 1027 particles of CO2
y = your amount
b = bro's amount
y-5 = b + 5
and
y +12 = 2 ( b-12)
y = 2b - 36 <===== sub into first equation
2b-36 -5 = b + 5
b = $ 46 y = 56
The time at 60 mph d/60
The time at 80 mph d/80
Time for the whole trip 2d / a where a = average
d/60 + d/80 = 2d/a
a = 2d / ( d/60 + d/80) = 2 / ( 1/60 + 1/80) = 2 / ( 7/240) = 68.57 mph average
Ha! BB is correct ! I do not know why I typed that last line Corrected... THANX, BB !
-b = -2.50
b = $ 2.50
Happy Birthday, Melody ! You don't have to count them any longer, but you have to celebrate them !
( What anniversary of your 21st birthday IS it ?!?)
~ EP
Assuming they can pick the same number
36 choices
2 7
2 13
5 7
5 13
7 11
3 3 the red ones can be reversed 11 choices out of 36
OOps...I see from Max answer I missed 11 13 13 11 so the answer would be the same 13 /36 (Thanx, max!)
Given:
2c + 3b = 16.50
1c + 2b = 9.50 <===== multiply this equation by -2 then add to top equation ( this will eliminate 'c')
-2c -4b = -19.00 now add the top and the bottom
b = $ 5.00
Plug in the point given
x = 4y+a
1 = 4(2) + a shows a = -7
y = 4x+b
2 = 4(1) + b
b = -2
1 + 4
4 + 1
3 + 2
2 + 3
6 + 9
9 + 6
7 + 8
8 + 7
11 + 4
4 + 11
3 + 12
12 + 3
10 + 5
5 + 10
Can't roll the red ones AND the black ones above each red..... the dice are marked differently......
first answerer missed 11 - 4 so correct answer is 7 out of 36 or 7/36
