Matt wants to call his mother long distance. The rate is $0.80 for the first three minutes and $0.20 for each additional minutes. How long can he talk for $3.00?
And
Anna is in has $1.35 in change. A call home costs $0.60 for the first five minutes and $0.15 for each addition minute. How long can she talk?
I really need the formula for these ><
2007-03-08 13:59:39 · 7 answers · asked by Bright Hikari 1 in Education & Reference ➔ Homework Help
Ok, I know thr answers. The teacher gave them to us in class. I just need HOW to do it so I can turn it in tomorrow.
2007-03-08 14:16:01 · update #1
idk if im right but i got 14 for the first and 10 for the second
2007-03-08 14:08:07 · answer #1 · answered by Anonymous · 0⤊ 0⤋
the first answer is 14 minutes
u r payin $0.80 for 3 minutes (the first three). When u deduct that amount out of the $3 you get $2.20 ( which is $3-$0.80); then you divide that number by $0.20 (2.20/0.20 = 11).
At the end you add 11 + 3 = 14 minutes.
If you wanna put everything in a linear operation, here it goes:
$3 - $0.80 = $2.20
$2.20 / $0.20 = 11 minutes
11+3=14 minutes.
YOU ARE ADDING THE 3 min AT THE END BECAUSE YOU SPENT $0.80 FOR THE FIRST 3 MINUTES OF YOUR CALL
For the other exercise, the case is the same, try to follow the exercise I jut completed for you to understand the situation and solve it for yourself. I can tell you that the answer is 10 minutes so you can check at the end if you get it right. Good luck and let me know if you were able to get it.
Take care
2007-03-08 22:24:25 · answer #2 · answered by MJ 2 · 0⤊ 1⤋
1.) let x : the number of additional minutes Matt can talk
0.80 + 0.20x = 3.00
0.20x = 2.20
x = 11 additional minutes
11 + 3 = 14 minutes in total
So Matt can talk for 14 minutes.
2.) let x : additional minutes Anna can talk
0.60 + 0.15x = 1.35
0.15x = 0.75
x = 5 additional minutes
5 + 5 = 10 minutes in total
So Anna can talk for 10 minutes
2007-03-08 22:21:53 · answer #3 · answered by rooster1981 4 · 0⤊ 1⤋
Matt can talk for 14 minutes
$ 0.8 for 3 minutes + $2.2/0.2 = 14
Ann can talk for 10 minutes.
$0.6 for 5 minutes + $0.15 * 5 = 10
2007-03-08 22:06:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Matt can talk for 6 minutes.
2007-03-08 22:10:19 · answer #5 · answered by Ike 2 · 0⤊ 2⤋
the anwser for the first one is im pretty sure the answer is he can talk for 6 minutes. the second one is i think she can only talk for about 2 minutes.
2007-03-08 22:11:19 · answer #6 · answered by Ericka S 1 · 0⤊ 2⤋
.80 * 3 + .2 (x-3) = 3.00
1.35 - .6 *5 - (.15)(x-5) = 0
2007-03-08 22:04:23 · answer #7 · answered by Jesse P 2 · 0⤊ 2⤋