The cost of calling Nogales is $1.12 for the first 3 minutes and 52¢ for each additional minute, what would be the cost of a 10-minute call?

2 Answers
Jun 19, 2018

So we know that the first 3 minutes out of the 10 minutes call to Nogales is #$1.12# as stated in the information provided.

The remaining 7 minutes cost #0.52# each which means we need to multiply 7 by 0.52 like this:

#0.52*7=3.64#

Now we add it to #1.12# like this:

#3.64+1.12=4.76#

Our final answer is that it cost #$4.76# to make a 10 minute call to Nogales.

Jun 19, 2018

$4.76

Explanation:

Let's write an expression to calculate the cost:

#C=1.12+0.52(m-3)#

Where #C# is the cost, and #m# is the number of minutes. We subtract 3 because the first 3 minutes of talk is covered by the initial cost. We can now plug in our time (10 minutes) to calculate the cost:

#C=1.12+0.52(color(blue)(10)-3)#

#C=1.12+0.52(7)#

#C=1.12+3.64#

#color(green)(C=4.76#