Answer:
x=15
Step-by-step explanation:
x+165degrees=180degrees
x=180-165
x=15
Let
y-------> number of books read during the month 
x------> number of picture of a book
we know that

in this problem
for 
calculate y

therefore
the answer is
The number of books read during the month
is 
Answer:
c
Step-by-step explanation:
Answer:
Add 3 over each interval
Step-by-step explanation: