Answer:

Step-by-step explanation:
we have the expression:

We need to multiply the two terms in the first parenthesis by the two terms in the second parenthesis:

we solve each term taking into account the law of signs
(-)(-)=+
and
(+)(-)=-
also for the first term we use that 
thus we have:

it can be simplified a little more if we factor an r of the second and third term:

D=18 B=45 I think this is correct it should be
Answer: 4(10 +8) = 72
Step-by-step explanation:
You want to distribute the 18 and make it smaller so you change it to 10 + 8. Then you do 4(10) + 4(8) = 40 + 32 = 72
The answer is A( +7) x (-5)
Answer:
True
Step-by-step explanation:
The given statement is true as a common approach to keeping a record of each customer's account receivable is to use a subsidiary accounts receivable ledger. An account's receivable subsidiary ledger is an accounting ledger that shows the transaction and payment history of each customer to whom the business extends credit.