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Algebra prob

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Algebra prob

by selango » Tue Jul 13, 2010 8:07 am
When a tree was planted it was 4 feet. Its height increased by a constant amount each year for 6 years. After 6 years the tree was 1�5 taller than at the end of 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 later
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by kvcpk » Tue Jul 13, 2010 8:17 am
selango wrote:When a tree was planted it was 4 feet. Its height increased by a constant amount each year for 6 years. After 6 years the tree was 1�5 taller than at the end of 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 later
Let the height increased each year be x.
then 4+6x - (4+4x) = (4+4x)/5
10x = 4+4x
6x = 4
x=2/3

pick D
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by agganitk » Tue Jul 13, 2010 8:19 am
Ans : 2/3


4+6x = (4 + 4x) * (6/5)

x = 2/3
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