7500 g is 7.5 KG. divide both by 7.5 and you get 1KG = $2.56
Given:
Total number of coins (Quarters and dimes) = 60
Total amount = $12.45
To find:
The number of quarters and dimes.
Solution:
Let x be the number of quarters and y be the number of dimes.
We know that,
1 quarter = 0.25 dollar
1 dime = 0.10 dollar
Total coins:
...(i)
Total amount:
...(ii)
From (i), we get
...(iii)
Putting this value in (ii), we get
![0.25x+0.10(60-x)=12.45](https://tex.z-dn.net/?f=0.25x%2B0.10%2860-x%29%3D12.45)
![0.25x+6-0.10x=12.45](https://tex.z-dn.net/?f=0.25x%2B6-0.10x%3D12.45)
![0.25x-0.10x=12.45-6](https://tex.z-dn.net/?f=0.25x-0.10x%3D12.45-6)
![0.15x=6.45](https://tex.z-dn.net/?f=0.15x%3D6.45)
Divide both sides by 0.15.
![x=\dfrac{6.45}{0.15}](https://tex.z-dn.net/?f=x%3D%5Cdfrac%7B6.45%7D%7B0.15%7D)
![x=43](https://tex.z-dn.net/?f=x%3D43)
Putting x=43 in (iii), we get
![y=60-43](https://tex.z-dn.net/?f=y%3D60-43)
![y=17](https://tex.z-dn.net/?f=y%3D17)
So, the number of quarters is 43 and the number of dimes is 17.
Therefore, the correct option is b.
Answer:
x=6
Step-by-step explanation:
a^2 +b^2=c^2
b=8
8^2=64
6^2=36
10^2=100
36+64=100
Answer:
Option C is the correct answer
Step-by-step explanation:
![\huge ={\frac{3 }{12}}](https://tex.z-dn.net/?f=%5Chuge%20%3D%7B%5Cfrac%7B3%20%7D%7B12%7D%7D%20%20)
Answer:
B
Step-by-step explanation:
Because -15 + 2 = -13