For his phone service, Michael pays a monthly fee of $13,and he pays an additional.$0.06 per minute of use. The least he has been charged in a month is $85.30.
What are the possible numbers of minutes he has used his phone in a month?
Use m for the number of minutes,and solve your inequality for m
Let's assume that in a month Michael has used his phone for m minutes.
The additional cost for the minutes of use is given by 0.06m.
Therefore, the total cost for the month is 13 + 0.06m.
According to the given information, the least he has been charged in a month is $85.30.
So we can set up the following inequality:
13 + 0.06m ≥ 85.30
We can solve this inequality for m.
13 + 0.06m ≥ 85.30
Subtract 13 from both sides:
0.06m ≥ 72.30
Divide both sides by 0.06 (which is the coefficient of m):
m ≥ 1205
So the possible numbers of minutes he has used his phone in a month are m ≥ 1205.
To find the possible numbers of minutes Michael has used his phone in a month, we can set up an inequality.
Let's assume m represents the number of minutes he has used his phone in a month.
According to the given information, he pays a monthly fee of $13, and an additional $0.06 per minute of use.
The total amount he pays in a month can be expressed as:
Total charge = Monthly fee + Additional charge for minutes used
Total charge = 13 + 0.06m
We are also given that the least he has been charged in a month is $85.30. So, we can write the inequality:
85.30 ≤ 13 + 0.06m
Next, let's solve this inequality for m:
85.30 - 13 ≤ 0.06m
72.30 ≤ 0.06m
To isolate m, divide both sides of the inequality by 0.06:
72.30 / 0.06 ≤ m
1205 ≤ m
Therefore, the possible numbers of minutes he has used his phone in a month are m ≥ 1205.
To find the possible numbers of minutes Michael has used his phone in a month, we can set up an equation using the given information.
Let's assume the number of minutes Michael has used his phone in a month is represented by 'm'.
The cost per minute of use is $0.06. So, the additional cost for m minutes would be 0.06 * m.
Given that the least Michael has been charged in a month is $85.30, we can set up the equation:
Monthly fee + Additional cost for minutes = Least charged amount
$13 + 0.06 * m = $85.30
Now, let's solve this equation for 'm':
$0.06 * m = $85.30 - $13
$0.06 * m = $72.30
To isolate 'm', divide both sides of the equation by $0.06:
m = ($72.30) / ($0.06)
m = 1205
Therefore, the possible number of minutes Michael has used his phone in a month is 1205.