Mean is 30,median is 30.5,mode is 31.
400-5x greater than or equal to 250
-400. -400
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-5x greater than or equal to -250
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-5. -5
X is less than or equal to 50
*sorry no greater than and equal to key so...
Step-by-step explanation:

I'm not sure what your variables are, but I will try task 3 with you.
y=$500(in billions)
x= the number of years that have passed since 2009
percentage of decrease: 1 - % =
so your formula will look like this: y(1 - %)^x
Since a side is only 6 inches long and the total perimeter is 36; take 36/6 and you get 6. The only figure with six sides is a hexagon, thus your answer is hexagon.