Answer:
Yes if [3,5] is a set of integers then it contains elements 3,4,5
As Closed bracket denotes that extreme points are also included and 4 is mid element in between 3 and 5
1/4 divided by 7/1 equals 1/28
Let x = the amount that Seini earned
Then x + 25 = the amount that Gavin
The amount Gavin earned would also = 425 - x (your directions asked you to have 2 equations.)
Together they earned 425:
x + (x + 25) = 425
2x + 25 = 425
2x = 400
Now divide both sides by 2 to find x.
Use all of this data to satisfy the directions.