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Multiple Choice: Basic Math Logic?
Tara is deciding between 2 long distance companies. The first company charges $7.95 each month and $0.07 per minute. The second company charges a flat rate of $39.95 each month for unlimited long distance calls. How many minutes of long distance would she need to use each month for the two plans to cost the same amount?
a) 350
b) 402
c) 457
d) 509
____
Please show work AND explain.
THANK YOU AND GOD BLESS!!!
20 Answers
- 1 decade ago
the answer is C.
7.95 + .07x = 39.95
the x represents the minutes.
i set the equation equal to 39.95 beaceu no matter how much you talk for plan 2, it would always cost that much no matter WHAT.
but for plan one, the way they charge you is by finding out how many minutes you talked [x] and then multiplying that by .07 because that is how much they charge per minute.
therefore, i need a way for the first bill to equil the fixed rate of the second companies bill...and that is by talking for 402 minutes [when you solve the equation]
- 1 decade ago
The answer is C.
The formula is as follows:
x = # of minutes
7.95 + .07x = 39.95
-7.95 =-7.95
.07x =32
divide by .07= divide by .07
x = 457.14286...
or x=457
You can also check it - 457 minutes at 7cents a minutes is 457x.07 which equals 31.99. Add the flat rate of 7.95 and you get 39.94.
This is an easy one!!! Do your math!!!!
- Anonymous1 decade ago
i just did guess and check... the answer is C -
$.07 multiplied by 457 = 31.99
31.99 + 7.95=39.94
its not exactly 39.95, but its the closest one
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- 1 decade ago
The answer is C.
You've probably already learned about equations and how to solve them.
Just make an equation:
7.95+0.07m=39.95
m stands for minutes
then solve the equation.
0.07m=32
m=about 457
Hope I helped!
- Anonymous1 decade ago
to solve this you need an equation:
7.95+.07x=39.95
Subtract 7.95 from both sides:
7.95+.07x=39.95
-7.95 -7.95
You get:
.07x=32
divide .07 to both sides
.07x=32
/.07 /.07
you will get approximatly
457
So the answer is C
Source(s): Algebra - Anonymous1 decade ago
C..
39.95-7.95=32
32/.07= 457.143
good luck!! :) god bless :p