Fibonacci is famous for his contributions to number theory.
In his book, Liber abaci he introduce the Hindu-Arabic place-valued decimal systems and the use of Arabic Numerals into Europe.He introduced the bar we use in fractions, previous to this, the numerator has quotations around it. The square root notation is also is Fibonacci method.
Answer:
c
Step-by-step explanation:
180= 45+ (5x+35)
-45 -45
135 = 5x + 35
-35 -35
100 = 5x
/5 /5
x=20
The answer is in decimal formal in the file below
Answer:

Step-by-step explanation:
To convert from feet to yards, divide by the value 3.
All the attatchments include the directions below:
Prepare a two-way table as shown below.
Enter the number 50 in the two-way table
Prepare a column total and enter 68 for the total number of people who split the check.
The total number of people who do not eat desert are 56, and the total number of people who took the survey are 122. Enter both values.
The remaining values can be found out as shown below.