When a certain tree was first planted, it was 4 feet tall, and the height of the tree increased by a constant amount each year for the next 6 years.At the end of the 6th year, the tree was 1/5 taller than it was at the end of the 4th year. By how many feet did the height of the tree increase each year?
A. 3/10
B. 2/5
C. 1/2
D. 2/3
E. 6/5
OA is D
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When a certain tree
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atlantic
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1st year = 4'+x
2nd year=4'+2x
3rd year=4'+3x
4th year=4'+4x
5th year=4'+5x
6th year=4'+6x
Being 'x' the annual increase.
Algebrically the statement says 6/5*(4+4x)=4+6x
Solve it and find that x=2/3.
2nd year=4'+2x
3rd year=4'+3x
4th year=4'+4x
5th year=4'+5x
6th year=4'+6x
Being 'x' the annual increase.
Algebrically the statement says 6/5*(4+4x)=4+6x
Solve it and find that x=2/3.
