Asked by Amy

The height of a Norway Spruce is 10 feet. 2 1/2 feet per year, how long will it take the tree to reach the height of 25 ft?

Write an equation that could be used to find how long it will take for the tree to reach a height of 25 ft.
Answered by Steve
After x years, the height y is

y = 10 + 2.5x

So, find x when y=25
Answered by Amy
12.5 years
Answered by Steve
Huh?

10+2.5x = 25
2.5x = 15
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