Answer:The number of books that he had before last week is 28
Step-by-step explanation:
Let x represent the number of books that he had before last week.
Demetrious returned five library books last week. This means that the number of books left is x - 5
He returned three books this week. This means that the amount of books left is x - 5 - 3 = x - 8
He then checked out 8 more books. This means that the amount of books left is x-8-8 = x - 16
He now has 12 library books. This means that
x - 16 = 12
x = 12 + 16 = 28
Sum of ( 2x-5y) and (x+y)?
=2x-5y+x+y
=3x-4y
Addie's speed was 
Step-by-step explanation:
Given,
Distance walked by Addie = 
Time taken by Addie = 45 minutes
Converting the time into hours;
1 hour = 60 minutes
45 minutes = 
Distance = Speed * Time
Speed = Distance/Time
Speed = 
Speed = 
Speed =
Addie's speed was
Keywords: speed, distance
Learn more about speed at:
#LearnwithBrainly
Answer:
15w + 5
Step-by-step explanation:
(2w + 13w) + (4 + 1)
I think that's correct
When working with polygons the main properties which are important are:
The Number of sides of the shape
The Angels between the sides of the shape
and
The Length of the sides of the shape.
