84+8x=15x+140
Subtract 84 from both sides
8x=15x+56
Subtract 15x from both sides
-7x=56
Divide both sides by -7
x=-8
Coin 1 is Q, the very top coin is N and the one below that is Q. For the bottom coin 2 that's N and the very bottom is also N and the one on top of the very bottom is Q. I hope that helped!
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Answer:
Max's paper airplane flew 
feet or 
feet.
Step-by-step explanation:
As Nora's paper airplane flew 9 1/6 feet
i.e.
Nora's paper was farther than Max's plane flew by = 2 3/4 feet
i.e.
Thus the equation to show how far Max's paper airplane flew is:
Therefore, Max's paper airplane flew feet or feet.
Answer:
Bl^2+4Bl*Fh
Step-by-step explanation:
I'm not quite certain what "draw a net" means here. But for part b, we are doing the formula. The bottom part is a square(assumingly so take this with a grain of salt), thus making the base equal to 3*3 cm or 9 cm^2. The triangular faces are each 3*2.24 cm or 6.72 cm^2. We then multiply this by 4 to get 26.88. Thus, the equation is Bl^2(Base length squared)+Bl*Fh(Face height, I forgot the official name sorry about that)*4 for part b.
Answer:
First one is 6 16/21
Second one is 3 14/15
Step-by-step explanation:
