Every week he withdraws $35 from the $950 in his savings, and he wants at least $600 by the end of the summer. So we could write:

Where 'x' is the number of weeks. Now let's solve it for 'x'.
Subtract 950 to both sides:

Divide -35 to both sides, don't forget to switch the sign when dividing/multiplying by a negative number:

So he can only withdraw at money for at most 10 weeks if he wants at least $600 left in his account.
Answer:
C.
3 units to the right would mean you are adding the positive value of 3 to the number 5
LCD of 2 16 and 8 is definitely 16.
1/2 = (1/2)*(16/16) = 8/16
3/16 = (3/16)*(16/16) = 3/16
7/8 = (7/8)*(16/16) = 14/16