Answer:
it would be D 5 hope this helps :)
Step-by-step explanation:
You could understand the ration as parts: the total number of parts was 3+7=10.
So girls were 3/10 parts and boys 7/10 parts. The difference was 7-3=4 parts. this difference is equal to 360, so each part is 90 (4*90 =360).
so girls are "3 parts" and each part is 90, then the number of girls is 3*90=270.
The answer to your question is x = -3
First calculate the total
8 bags x 3.5 cups=28 cups total
28 cups/ 12 hikers = 2.33
Each hiker will receive 2 and 1/3 cups of trail mix
6 - b/3a a = 10, b = 9
6 - 9/(3*10)
6 - 9/30
6 - 3/10
6 - 0.3
<span>= 5.7 or 57/10</span>
