Bernard counted 8 posts along the side of the road. If the posts were 20meters apart how far is the first post from the last

1 answer:

3 0

There will be seven spaces between the 1st and the 8th post.
The distance between posts is 20 meters
The distance between the 1st and the 8th post is 20×7 = 140 metres

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Brain correctly use a method of completing the square to solve the equation:

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