Answer:
60cm
Step-by-step explanation:
1.)4
2.) 10
3.)6
4.)20
5.)5
6.)7
7.)7
8.)12
9.)8
10.)25
11.)3
12.)10
N= number of books
7.50(n + 0.2)=189
multiply 7.50 by each term in parentheses
(7.50*n) + (7.50*0.2)= 189
7.50n + 1.5= 189
subtract both sides by 1.5
7.50n= 187.50
divide both sides by 7.50
n= 25
ANSWER: She ordered 25 books.
Hope this helps! :)
The only one is 40 6 12 18 24,30,36,42