A^2+b^2=c^2 and for the radios try 4
Answer: 14
Step-by-step explanation: hope this helps u :)
Answer: 9
Step-by-step explanation:
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
B. It is a right angle so we need a 90. If you substitute 12 for x, you will get 90.