Answer:
Alexis paid $110 for phone service.
Step-by-step explanation:
Well $50 is like a flat fee; you just pay it and you're done with it.
Meanwhile the $20 is not because it is <em>per month</em>, meaning for every month Alexis using her phone, she has to pay $20. Alexis uses her phone for 3 months.
So she paid $20 three times: 20×3
20×3=60
And then you add the 60 to the flat fee, which is $50.
$60+$50=$110
Alexis paid <u>$110</u> for phone service.
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I hope that helps! :)