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Answer:
We want to find the point where these two lines intersect:
Equation for Charles: y=0.25x
Equation for Wilma: y=0.05x+20
0.25x=0.05x+20
0.2x=20
x=100
So, Charles must use 100 gigabytes of data to equal Wilma's internet bill.
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The number of gigabytes of data that must be used for Charles' internet bill to equal Wilma's internet bill is; 100 gigabytes
What is the Intercept of the equations?
Let the amount of gigabyte of data be x.
Since Charles pays $0.25 per gigabyte of data, then the equation for Charles is; y = 0.25x
Wilma pays a flat fee of $20 and $0.05 per gigabyte and as such the equation for Wilma is; y = 0.05x + 20
For Charles' internet bill to equal Wilma's internet bill, Thus;
0.25x = 0.05x + 20
0.2x = 20
x = 20/0.2
x = 100
Thus, Charles must use 100 gigabytes of data to equal Wilma's internet bill.
Read more about equation intercepts at; https://brainly.com/question/26249361
