35,000 - 1900= 16,000 16,000-12,000=4,000
4,000 miles
**4000 **frequent **flyer miles **did **David **have last month.
Given that,
Together, David and **Carol **have a total of **35,000 **frequent **flyer miles **with an airline .
**Carol **has 19,000 miles .
After going on a business trip , David has **1200 **more **miles **than he had last month .
We have to determine ,
How many **frequent **flyer **miles **did David have last month .
According to the question ,
David and **Carol **have a total of **35,000 **frequent **flyer miles **with an airline .
**Carol **has 19,000 miles .
= 35,000 - 1900 = 16,000
After going on a business trip , David has **1200 **more **miles **than he had last month.
Then**,**
David have** **last month **frequent **flyer **miles **is,
= 16,000 - 12,000 = 4,000
Hence, **4000 **frequent **flyer miles **did **David **have last month.
To know more about Linear equations click the link given below.
https://brainly.com/question/20067450
David had 14,800 frequent flyer miles last month. This is calculated by first determining his current miles after a trip and then subtracting the additional miles he gained. Carol's miles contributed to the total combined mile figure of 35,000 miles.
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