The All in One wireless phone company offers a cell phone plan of 900 minutes per month for $59.99. Each minute over the first 900 is an additional $0.40 per minute. Which algebraic expression could be used to model Tom's total cell phone bill for using m minutes during the month of February, if Tom used more than 900 minutes that month?

$59.99 + 0.40( - 900)

Step-by-step explanation:

Given that:

Per month charges for 900 minutes = $59.99

After 900 minutes, each minute is charged $0.40 per minute.

Also, there are number of minutes used in February.

Plus, we know that:

To find:

Algebraic expression to represent the total bill in the month of February.

Solution:

Charges for the first 900 calls = $59.99

Total number of calls =

Total number of calls above 900 = - 900

Charges per call above 900 = $0.40

Charges for the calls above 900 = Number of calls above 900 Charges per call above 900 = 0.40( - 900)

Therefore, total charges for calls = $59.99 + 0.40( - 900)

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

idk

step-by-step explanation: