for the past 3 months, grace used her cell phone for 43 minutes, 62 minutes, and 57 minutes. how many minutes would she have to use her cell phone this month for the average over the four months to be 55 minutes?

Answer 1

To find the average, we need to add up the total number of minutes Grace used her cell phone over the four months and divide it by 4.

Total number of minutes = 43 + 62 + 57 = 162 minutes

To find the number of minutes Grace would need to use her cell phone this month for the average over the four months to be 55 minutes, we need to find the difference between the current total number of minutes and the desired average multiplied by 4.

Minutes needed this month = (55 * 4) - 162 = 220 - 162 = <<(55*4)-162=158>>158 minutes

Therefore, Grace would need to use her cell phone for 158 minutes this month to maintain an average of 55 minutes over the four months.

Answer 2

can you put this into a formula?

Answer 3

Certainly! Here's the formula to calculate the number of minutes Grace would need to use her cell phone this month for the average over the four months to be a specific value (let's call it "X"):

Minutes needed this month = (X * 4) - (Sum of minutes used in the past 3 months)

In this case, since we want the average over the four months to be 55 minutes, the formula becomes:

Minutes needed this month = (55 * 4) - (43 + 62 + 57)

You can substitute any desired value for "X" to find the corresponding number of minutes needed this month.

Answer 4

can u make this the equation?

Answer 5

Yes, here's the equation:

Minutes needed this month = (X * 4) - (43 + 62 + 57)

Where X represents the desired average in minutes.