5x + 10y = 50
x + y = 8
x = 8 - y
5*(8-y) + 10y = 50
40 - 5y + 10y = 50
10y - 5y = 50 - 40
5y = 10
y = 2
x + y = 8
x + 2 = 8
x = 8 - 2
x = 6
She has 6 nickels and 2 dimes
I think the answer is D. hours because its variation does not depend on another variable
The midpoint would be (5,9)
Answer: a= -1.477747,-1.153646,-0.076870
Step-by-step explanation: