For this case, we have the following equation of the second degree:

If we divide between 2 on both sides of the equation, we will have:

Where:

The solutions will come from:

Substituting:

So, we have:

Answer:

Option A
Option E
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:
c=10
Step-by-step explanation:
pythagreom theroem
c (hypotenuse) = 
plug in values for a and b
c=
c=
c=
c=10
Answer:
Rains and Splash
Step-by-step explanation:
2 verbs rains and splash
Answer:
x=129
Step-by-step explanation:
180-51=129