Last month a phone company charged $ 0.07 per minute for the first 300 minutes of calling time and $0.05 per minute for each minute of calling time in excess of the first 300 minutes . for how many minutes of calling time was bob charged by the phone company last month? 1) last month the phone company charged bob $21.00 for his calling time that was charged at $0.07 per minute.2) last month the phone company charged bob $40.00 for his calling time that was charged at $0.05 per minute.

1) 300 min

              2) 680 min

Step-by-step explanation:

1) As the charge was $21 at 0.07, x is the minutes he used, we have:

0.07x = 21

x = 21/0.07

x = 300

2) As the charge was $40 and the company charges different rates for minutes, we know from 1 that the first 300 min costs $21, we have

40 - 21 = 19

So $19 was charged with the $0.05 fee. so:

0.05x = 19

x = 19/0.05

x = 380

300 + 380 = 680 min

i think u have 12 apples sorry again i don't really know if it correct i'm just tryna hrlp people out.

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.