I'm not sure exactly what it is but it would be a negitive
Answer:
It is $42
if I am wrong then let me know so I can recheck my work
Let 
be the cost, respectively, of a notebook and a pen. If you buy 2 notebooks and 3 pens (which we know is a cost of $14.50), you spend 
Similarly, if you buy 1 notebook and 2 pens (which we know is a cost of $7.50), you spend 
These two equations form the following system:
Multiply the second equation by 2:
Subtract the first equation from the second:
So, a pen costs 0.5 dollars. Plug this equation in the second equation:
Answer:
111°
Step-by-step explanation:
∠DVB and ∠AVC are both vertical angles, meaning that they have the same measure and are a pair of opposite angles formed by intersecting lines. If ∠DVB is 111°, then ∠AVC is also 111°.
Answer:
9n + 7
Step-by-step explanation:
