Lets look at the hours they are open from. 9 am - 4:30 pm which is 7 and a half hours a day. Now we multiply 7 1/2 by the number of days they are open, which will be 7 1/2 * 255 = 1,912.5. This means that the library is open 1,912 1/2 hours a year.
I hope I've helped! :)
-6+2
--------- =
10-10
-4
---- =
0
m=0
*(the "-----" are supposed to be fractions, sorry if that looks confusing)*
y+2=0(x-10)
y+2=0
-2 -2
y=-2
Your answer would be "y=-2."
Step-by-step explanation:

3.
a. y=28.4x
b. 4,260 grams in 150 ounces
4. 2b - 11
Answer: that would be a reflection