If t is the amount of time she used it, then it lost t*(5/min) percentage points; then she charged it for 2t, so it gained (2t)*(2/min) =t*(4/min) percentage points.
This means that above this time period, the phone lost t*(5/min)-t*(4/min) =t*(1/min) percentage points; because this loss is recognized to be 10 percentage points, this means t*(1/min) =10, so t=10 min.
This means that she used her phone for 10 minutes and charged it for 20 minutes.
Answer:
-2 -1,1, and 2 only
Step-by-step explanation:
Answer:
The answer is D.
Step-by-step explanation:
B) In triangles ABC and ABD, one side and one common angle are equal
I’m not sure what that is
