plan has a $22 one time activation fee, and charges .10 a minute. the second plan has no activation fee, and charges .14 cents a minute. After how many minutes of calls will the two plans be equal?
2007-12-14 17:10:44 · 4 answers · asked by Trisha 2 in Science & Mathematics ➔ Mathematics
OK
Plan A = 22+.10x
Plan B = .14x
So
22+.10x = .14x
22 = .04x
550 = x
So at 550 minutes they will be equal
If you use less than 550 minutes go with B. If you use more than 550 minutes, use plan A.
Proof
22 + .10(550) = .14(550) ??
22 + 55 = 77
77 = 77 YES!!
Hope that helps.
2007-12-14 17:28:37 · answer #1 · answered by pyz01 7 · 0⤊ 0⤋
one plan is 27 cents plus x-minutes situations 15 cents the a number of is purely x-minutes situations 19 cents So set them such as a minimum of one yet yet another: 27 + 15x = 19x and now confirm for x 27 = 4x 6.seventy 5 = x
2016-11-27 01:32:15 · answer #2 · answered by bainter 4 · 0⤊ 0⤋
PLAN1 = $22 + (0.1)(n)
PLAN2 = (0.14)(n)
n = # of mins
Set up an equation so that PLAN1 = PLAN2.
$22 + 0.1n = 0.14n
$22 = 0.04n
n = 550
So it would be after 550 mins.
2007-12-14 17:42:14 · answer #3 · answered by Anonymous · 0⤊ 0⤋
the answer is AFTER 550 MINS OF USE, the plans will both cost $ 77.00
2007-12-14 17:29:48 · answer #4 · answered by Mike 7 · 0⤊ 0⤋