
Concept explainers
(a)
Write an expression for Raul`s monthly data costs
(a)

Answer to Problem 23PPS
Expression:
Explanation of Solution
Given:
Condition given: A tablet data provider offers different plans for data usage. The plan Raul chose has a monthly fee of $29.99 per month for 5 GB of data with an additional cost of $10 for each gigabyte over 5.
Concept Used:
Let the number of extra GB Raul used is ‘ x’
Monthly fee of $29.99 per month for 5 GB of datawith an additional cost of $10 for each gigabyte over 5 GB.
Cost of extra GB used at the rate $10 per GB =
Calculation:
Expression: Monthly charge + cost of extra GB used
Expression:
Thus, the required expression is
(b)
Find the minimum number of GB of data Raul can use per month to make unlimited plan cheaper.
(b)

Answer to Problem 23PPS
Minimum 3GB of extra data
Explanation of Solution
Given:
Condition given: A tablet data provider offers different plans for data usage. The plan Raul chose has a monthly fee of $29.99 per month for 5 GB of data with an additional cost of $10 for each gigabyte over 5.
Concept Used:
Raul learns that his data provider is offering an unlimited data plan for $59.99 per month.
Find the minimum number of gigabytes Raul could use per month to make the unlimited plan cheaper than his current plan.
According to this condition the unlimited plan $59.99 must be cheaper than the previous plan he choose
Calculation:
In words: Previous plan > unlimited plan
In inequality equation form:
Solve the inequality:
Minimum number of GB of data Raul can use per month to make unlimited plan cheaper is 3GB.
Thus, Raul can used 3GB of extra data to make the unlimited plan is cheaper than his regular plan .
Chapter 2 Solutions
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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