I believe by the first equation they are referring two a representation of the total amount of money made up by the two types of coins. I found this to be 0.05x + 0.10y = 3.50
In my work I solved for the amount of each coin- I assume this is what the final step of your problem entails. If you need any help understanding/ I misinterpreted something please feel free to comment and ask :)
#5c coins or x= 36
#10c coins or y= 17
Here's how you would do that , 162.3
Answer:
4.35
Step-by-step explanation:
The expected value can be defined as: where x_i = the payout, and p_i = the probability of it occurring.
This gives us the expression:
So the expected payout is 4.35
Answer:
if you meant y = 10x, then false
Step-by-step explanation:
(-1,-30) means that x = -1 and y = -30
so then substitute those variables in y = 10x
-30 = -1 * 10
-30 = -10, that's false
Answer:
See explanation
Step-by-step explanation:
Use the definitions:
Now,
and
As you can see, left and right parts simplify to the same expression, so left and right parts are the same.