Before tax, and miscellaneous charges, Jason's cell phone bill is $100 per month plus $0.15 for every text message that he sends
2 answers:
Answer:
.
Step-by-step explanation:
Let x represent number of texts.
We have been given that Jason's cell phone bill is $100 per month plus $0.15 for every text message that he sends or receives.
Since cost of sending or receiving each text is $0.15, so cost of receiving and sending x texts would be .
The total cost of bill would be fixed charge $100 plus cost of receiving and sending x texts. Therefore, Jason's cell phone bill would be .
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Answer:
You can proceed as follows:
Step-by-step explanation:
First solve the quadratic inequality . To do that, factorize, then we have that
. This implies that
or
In the first case the solution is the empty set . In the second case the solution is the interval
. Now we have that
.
To show that consider
. Then
, this implies that
, then
. Now, to show that
consider
, then
, then
, then
, this implies that
.
Observe the image below.
