You have a $20 phone card. calls made using the card cost $.03 per minute to destinations in the united states and $.06 per minute to destinations in brazil. write an inequality describing the numbers of minutes you can use for calls to the u. s. and brazil.

 .03x + .06y ≤ 20

Step-by-step explanation:

Let x represent the number of minutes to the US and

let y represent the number of minutes to Brazil

and make sure their sum is not greater than $20

.03x + .06y ≤ 20

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)