I think that the answer is 20
Ok, so to find the answer to this question, first you need to find the specific facts in the problem such as what she ate and for how long/ the period of time. It looks like you have got that already so let's skip it. So, next, you have to find out how many she eats in one month by dividing 4 from 6. Now since this turns up to a decimal we can use a different method. Two years equals 24 months and 4 times 6 equals 24 so, for the two years, Barb is going to eat 36 hamburgers. Hope this helped!
Let x = number of 5 cent coins.
Then there are (x+2) 10 cent coins.
Let y = 20 cent coins.
Total coins: x+(x+2)+y = 30
2x+y=28
y = 28-2x (1)
Total value: 0.05x + 0.1(x+2) + 0.2y = 3.80
0.15x + 0.2y + 0.2 = 3.80
0.15x + 0.2y = 3.60 (2)
Substitute (1) into (2).
0.15x + 0.2(28-2x) = 3.60
-0.25x + 5.60 = 3.60
2.00 = 0.25x
8 = x
From (1), obtain y = 28 - 2(8) = 12
Answer: (x+2) = 8+2 = 10
Louise has 10 10-cent coins
Sorry bro its past 10pm now, hope you figured it out
