Let us say Samantha spends $x for her school at lunch every week.
We are given that she can spend as much as $15 every week for her school at lunch every week.
As much as stands for maximum quantity that she can spend.
So $15 is the maximum she can spend.
Writing an inequality,
D=25m+50
D=(25)(8)+50
D=200+50
D=250
There will be $250 after 8 months.
3 7/8 Converted into decimal equals 3.875
7/8 = 0.875 + 3