Answer:
715 minutes
Step-by-step explanation:
we know that
To find out how many more minutes he can use, subtract the number of minutes he has already talked from the number of minutes of his plan
Let
x -----> the number of minutes of his plan
y -----> he number of minutes he has already talked
so
[tex]x-y[/tex]
we have
[tex]x=1,500\ min\\y=785\ min[/tex]
substitute
[tex]1,500-785=715\ min[/tex]