12'5" is 149 inches. If 149in is the maximum, then anything above it including 162" cannot pass through safely.
No. To test whether a graph is a function or not you do the vertical line test where if a vertical line touches more than one point it is not a function
You have to move the x's to one side so
5x-2x<-1+7
3x<6
Then you get x alone so you divide both sides by 3
X<2
You switch the sign
X>2
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