Answer:
Associative Property
Step-by-step explanation:
Answer:
Expression: 
Value of the expression when 
: 
Step-by-step explanation:
Let's first focus on the expression: '6 more than twice a number'. Twice a number is the same as saying two times a number. Let's have that number be represented by 
. Twice a number would mean 
, and 6 more than that would just be .
We'll then plug in 5 for to get the value of the expressinn:
The standard form is 20000 + 1000 + 70
Answer: 50 Books
Step-by-step explanation:
B = number of books in Ruben's collection BEFORE he bought new ones.
So 6 books were bought which increased his collection by 12%.
12% as a decimal would be 0.12..then we add the variable which represents the number of books, 0.12B.
So then we know 0.12=6
*We need to isolate the variable* So we would divide 0.12 on both sides. 0.12/0.12 and 0.12/6 which is 50.
Hope this helps! :)
