Equation 1. N+D=500
equation 2 5N+10D=3000
This is for equation 1
N=500-d
Substitute into equations 2 and solve for D
5N+10D=3000
5(500-D)+10D=3000
2500-5D+10D=3000
5D=500
D=100
Lets go back the equation 1
N=500-D
N=500-100
N=400
there are 400 Nickles and 100 Dimes
Answer:
a 20 times
Step-by-step explanation:
Answer:
It would be B.
Step-by-step explanation:
4.5 hours = 270 minutes
Answer:
true
Step-by-step explanation:
The answer is the third choice: -1