She made a mistake in steps 3-4
Hi there
Ending balance
Previous balance+finance charge-payment
Find the finance charge
500×0.012=6
Ending balance
500+6−100=406
Good luck!
All marbles together are 24 marbles. 14 of those are yellow marbles. 24 subtract 14 is 10. the probability of the marble not being yellow is 10/24
Answer:
230 were sold at the door
170 were sold in advance
Step-by-step explanation:
x=at door y=in advance
x+y=400
3x+2y=1030
y=-x+400
2y=-3x+1030
y=-3/2x+515
-x+400=-3/2x+515
x=230 y=170