I know the correct answer but I need you to first answer my math questions
Answer:
Sara
Step-by-step explanation:
I’m guessing that this is for systems of equations?
n - nickels
d - dimes
These are the equations you start off with.
n = 5d-2
0.95 = 0.10d+0.05n
Substitute the top equation for n into the variable n in the bottom equation.
0.95 = 0.10d+0.05(5d-2)
Solve for d.
0.95 = 0.10d+0.25d-0.10
1.05 = 0.35d
3 = d
Substitute d into the top equation and solve for n.
n = 5(3)-2
n = 15-3
n = 12
There are 3 dimes and 12 nickels in the coin purse! Hope this helped <3
Answer:
C. 25
Step-by-step explanation:
When the numbers with same base are multiplied, their powers add up
5^-5/2 * 5^9/2
5^(-5/2 + 9/2)
5^(4/2)
5^2
25
