Answer:
The linear equation that represent the situation is 
The remaining balance on his gift card is 
Step-by-step explanation:
Let
x------> represents the remaining balance
we know that
The linear equation that represent the situation is equal to

Solve



Answer:
1:2
Step-by-step explanation:
There are 5 Ns and As in San Antonio. There are 10 total letters. So it is 5:10 which reduces to 1:2
Your answer will be 60%
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