Answer:
the cost of each book = $24
Step-by-step explanation:
(if all the books have the same price)
Let x be the price of one book
“She had $157 and After buying 6 books ,she was left with 13$“ means
“157 = 6x + 13”
now we have an equation to solve :
157 = 6x + 13
⇔ 157 - 13 = 6x
⇔ 144 = 6x
⇔ 24 = x
10 and -12
Step-by-step explanation:
10x-12=-120
it said it needed to be 20 characters long. so this is me making it that
Answer:

Step-by-step explanation:
We can simplify the expressio using the product rule. The exponents will add up when multiplied with each other:



The answer is B
