Please help me ASAP I really need to know the answer before the teacher calls on me!1!!1!1!1!
1 answer:
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Answer:
At most 38 text messages.
Step-by-step explanation:
Let x represent number of text message you send or receive.
We have been given that the cell phone plan charges $.13 for each text message you send or receive. So amount charged for sending or receiving x text messages would be .
We are also told that your cell phone plan cost $39.99 per month, so total cost of monthly bill would be .
Since you can spend at most $45, so total cost of x messages should be less than or equal to 45 as:
Therefore, you can send or receive at most 38 text messages.
Answer: Option B
Step-by-step explanation:
By definition, only those functions that are one to one have an inverse function.
A function is one by one if there are not two different input values, and
, that have the same output value y
Note that the function is not a one-to-one function
When x=2
When x=8
Note that the function is not a one-to-one function
When x=1
When x=-1
Note that the function is not a one-to-one function
When x=1
When x=-1
Then the answer is the option B.
You can verify that The function is a one-to-one function and therefore its inverse is a function