They can line up 20 different ways
Hello.
Fractions can be added and subtracted only if they are like fractions.
Example:

We can subtract these fractions because they are like fractions (they have the same denominator)
Another Example:

We can add these fractions because they are like fractions.
Therefore, the answer is "like"
I hope it helps.
Have a nice day.

Answer:
Option B
The volume of the box is 
Step-by-step explanation:
we know that
The volume of the box is equal to the volume of one cubical block multiplied by four
so
Find the volume of one cubical block

therefore
The volume of the box is equal to

Answer: a) 4 b) Bachelor’s
Steps:
1000 * 4%
1000 * 0.04
40
1000 + x = 1160
x = 160
160 / 40 = 4
Went to school for 4 years
A 4 year college degree is a bachelor’s degree