Answer:
7 marble's
Step-by-step explanation:
55 marbles and twice as many white marbles as red marbles and he has 5 more blue marbles than white marble's
0-9 = 4
10-19 = 3
20-29 = 9
30-39 = 5
its a 30% increase
If 250 is 100% then you need an increase by 75 to get to 325
250*.3 = 75
75 is 30% of 250
250 + 30% (75) = 325
