Answer:
8 lines in the symentery
Step-by-step explanation:
of the lines
D is the right answer you just have to minus
Answer:
Amounts in the intervall 
Step-by-step explanation:
We will take the variables c and s, where
c = amount to spend that month
s = savings of the month.
Since each month we save at least 100, we know that

Moreover, we earn $250 per month and we spend $20 in a kayaking club, which tells us that

and so

By multiplying by -1, the first inequality also tells us that

Consequently by adding 230 to the inequality, we get that

The numbers Three and Twelve give you a product of 36, and a sum of 15