Answer:
x=1
Step-by-step explanation:
It is given in the question that
Anna buys 12 pens and 20 pencils for a total cost of $16. One pen costs $0.40 more than a pencil.
Let the cost of pencil is $ x .
Therefore cost of pen is

According to the question

Distributing 12 and combining like terms, we will get

Therefore cost of pencil is $0.35 and cost of pen is

Answer:
slope = 0
Step-by-step explanation:
y = 3 is the equation of a horizontal line parallel to the x- axis.
Since it is parallel to the x- axis then slope = 0
Answer: a the first answer is right