Evaluate -4x + 7 for x = -1
2 answers:
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Given :
She run 3 miles 1 st day .
She run 5 miles 2 nd day .
Then she runs 7 miles per day .
To Find :
If she total runs 99 miles , for how many days has Carla been running 7 miles.
Solution :
The relation between total miles run and number of days she run 7 miles is :
Putting , D = 99 miles , we get :
From 13 days she is running 7 miles in a day .