The answer is b ok have fun
Answer:
32 Nickels
Step-by-step explanation:
Given
Coins: Nickels (N) and Dimes (D)
$0.05 = 1 nickel and $0.10 = 1 dime
So, the amount implies:
![0.05N + 0.10D = 6.20](https://tex.z-dn.net/?f=0.05N%20%2B%200.10D%20%3D%206.20)
The number of coin implies:
![D = 14 + N](https://tex.z-dn.net/?f=D%20%3D%2014%20%2B%20N)
Required
Determine the number of nickels found
Substitute 14 + N for D in ![0.05N + 0.10D = 6.20](https://tex.z-dn.net/?f=0.05N%20%2B%200.10D%20%3D%206.20)
![0.05N + 0.10(14 + N) = 6.20](https://tex.z-dn.net/?f=0.05N%20%2B%200.10%2814%20%2B%20N%29%20%3D%206.20)
![0.05N + 1.4 + 0.10N = 6.20](https://tex.z-dn.net/?f=0.05N%20%2B%201.4%20%2B%200.10N%20%3D%206.20)
Collect Like Terms
![0.05N + 0.10N = 6.20 - 1.4](https://tex.z-dn.net/?f=0.05N%20%2B%200.10N%20%3D%206.20%20-%201.4)
![0.15N = 4.8](https://tex.z-dn.net/?f=0.15N%20%3D%204.8)
Solve for N
![N = 4.8/0.15](https://tex.z-dn.net/?f=N%20%3D%204.8%2F0.15)
![N = 32](https://tex.z-dn.net/?f=N%20%3D%2032)
Hence, he found 32 nickels
Answer:
the guitar is now $58.5, the trumpet is now $104 both together is $162.5
Step-by-step explanation:
30% more would be $1.30 for each dollar so you multiply the original price by 1.30