Una persona sale de compras, gasta 3/7 de su dinero en el supermercado, despues 1/2 de lo que queda en regalos, y finalmente 1/2 de lo que queda en una libreria. Si le quedan 12 dolares, ¿ cuanto dinero tenia ?

112 dollars

Step-by-step explanation:

The best in this type of problem is to start from what we have, that is 12 dollars.

He had 12 dollars left after spending 1/2 in the bookstore, so before that would be 12 / (1/2) = 24 dollars.

Before that he spent 1/2 on gifts, then it would be 24 / (1/2) = 48 dollars he had before buying the gifts.

The first thing he did was spend his money in the supermarket therefore, it would be 48 / (3/7) = 112 dollars, that means that at the beginning he had 112 dollars.

We checked: at the supermarket 112 * (3/7) = 48 dollars

in gifts 48 * (1/2) = 24 dollars

and in the library 24 * (1/2) = 12 dollars

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)

42

step-by-step explanation: