Can some help me for number 25 where it says Evaluate this simplified polynomial for a=4 and b =-1. I don't understand it correc
tly please help man 
2 answers:
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Answer:
John is 9.21 km form the school.
Step-by-step explanation:
John leaves school to go home. His bus drives 6 kilometres north and then goes 7 kilometres west. It is required to find John's distance from the school. It is equal to the shortest path covered or its displacement. So,
So, John is 9.21 km form the school.