middle school math
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What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the plzzz write a proportion i will give you 100 points

Ineed someone to me answer my question i have to have this done and knocked out