# Math

This question has two parts.
Danielle's phone plan charges her \$30 per month for the first 200 minutes and then \$0.10 per minute for each subsequent minute.

1. Which of the following functions takes an input of any whole number value of x is greater than or equal to 200 and outputs the value for f(x) as the amount of dollars Danielle would pay for x minutes of phone usage?
A. f(x) = 0.1x + 10
B. f(x) = 0.1x + 20
C. f(x) = 0.1x + 30
D. f(x) = 0.1x + 200
E. f(x) = 0.1x + 230

2. If Danielle paid exactly \$100 last month, how many minutes did she use?
F. 700
G. 800
H. 900
J. 1,000
K. 1,200

1. 👍 0
2. 👎 0
3. 👁 259
1. 1. ) = 30 + 0.1(x-200)
F(x) = 30 + 0.1x - 20
The above Eq is valid for all real
values of X that are equal to or greater
than 200: X => 200.

When x = 200 minutes, the cost would be
\$30.

None of the given choices meets this
requirement.

2. Cost = 30 + 0.1x - 20 = \$100
0.1x = 100-10 = 90
X = 900 Minutes.

1. 👍 0
2. 👎 0
posted by Henry

1. 👍 0
2. 👎 0

## Similar Questions

1. ### math

You need to choose between two phone plans for local calls. Plan A charges \$25 per month for unlimited calls. Plan B charges a monthly fee of \$13 with a charge of 6 cents per local call. How many local phone calls in a month make

asked by connie on October 5, 2009
2. ### Math

Suppose your cell phone company offers two plans. The pay-per-call plan charges 14 dollars per month plus 6 cents per minute. The unlimited-calling plan charges a flat rate of 22 dollars per month. How many minutes per month must

asked by Anonymous on January 26, 2017
3. ### algebra2

10 points) Score 2. Allegra has a cell-phone plan that charges \$65 per month and \$0.10 for every minute that she uses the phone beyond what her plan allows. One month, she was billed \$73.40. a. Define a variable for the unknown.

asked by myira smith on December 9, 2014
4. ### Help Plz.. Algebra II

Allegra has a cell-phone plan that charges \$65 per month and \$0.10 for every minute that she uses the phone beyond what her plan allows. One month, she was billed \$73.40. a. Define a variable for the unknown. b. Write an equation

asked by Jullian on September 19, 2013
5. ### Math

Allegra has a cell-phone plan that charges \$65 per month and \$0.10 for every minute that she uses the phone beyond what her plan allows. One month, she was billed \$73.40. a. Define a variable for the unknown. b. Write an equation

asked by Jullian on September 19, 2013
1. ### management science

Kim Davis has decided to purchase a cellular phone, but she is unsure about which rate plan to select. The "regular" plan charges a fixed fee of \$55 per month for 1,000 minutes of airtime plus \$0.33 per minute for any time over

asked by Lisa on October 27, 2012
2. ### Math

I'm not sure how i'm supposed to set up the equation to solve this. A phone company offers a plan for long distance service charges of .08 per minute. Another phone company offers a plan for \$6 per month plus .02 per minute. For

asked by Jessie on October 21, 2014
3. ### Gr10 Math

Charlene is looking into cell phone plans. Cell plus gives unlimited minutes for \$50/month.A1 Cell offers a \$40 monthly fee, plus 5ยข/min for any time over 300min oer month. a)Define two variables and write a linear equation to

asked by Ana on September 25, 2011
4. ### algebra

Your new cell phone plan charges \$50 per month for 400 minutes of talk time. The plan charges \$0.10 for each additional minute you talk. You use 50 additional minutes this month. What is your bill for the month?

asked by alizay on January 18, 2016
5. ### Algebra

Jaden discovers another prepaid phone plan (Plan B) that charges a flat fee of \$15 per month, then \$.05 per text sent or minute used. Write an equation for the cost of Plan B.

asked by SAM on September 8, 2017

More Similar Questions