E = expresso
m = muffins
2e + 3m = 10.....multiply by -2
4e + 2m = 12
----------------
-4e - 6m = -20 (result of multiplying by -2)
4e + 2m = 12
------------------add
-4m = -8
m = -8/-4
m = 2....so muffins cost $ 2 a piece <===
4e + 2m = 12
4e + 2(2) = 12
4e + 4 = 12
4e = 12 - 4
4e = 8
e = 8/4
e = 2......so expresso's cost $ 2 a piece <===
C)90 because if it go all the way around it would be 180 and I don't see that
Answer:
Alice: 20 coins, Ben: 16 coins, and Carlos: 4 coins.
Step-by-step explanation:
We know that the dive results in 40 gold coins.
We know that:
Alice: $7,600 Ben: $5,900 Carlos: $1,400.
So they have $ 14900 in total.
Now we will divide that money by 40.
![x=\frac{14900}{40}\\\\x=372.5](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B14900%7D%7B40%7D%5C%5C%5C%5Cx%3D372.5)
So 1 gold coin costs $ 372.5. Now we will calculate how much they can get for the money they have.
![A=\frac{7600}{372.5}=20.4\\\\B=\frac{5900}{372.5}=15.8\\\\C=\frac{1400}{372.5}=3.75\\](https://tex.z-dn.net/?f=A%3D%5Cfrac%7B7600%7D%7B372.5%7D%3D20.4%5C%5C%5C%5CB%3D%5Cfrac%7B5900%7D%7B372.5%7D%3D15.8%5C%5C%5C%5CC%3D%5Cfrac%7B1400%7D%7B372.5%7D%3D3.75%5C%5C)
We conclude that:
Alice: 20 coins, Ben: 16 coins, and Carlos: 4 coins.
We find the area of all the faces and add those up
So
Total area = (12*5) + 2(1/2 *3 *4 ) + (4*12)+(3*12)
= 60 + 12 + 48 + 36
= 156 square feet
third option is the correct one