help with these problems!?
(-6)squared-20
-36-20
=-16?
A 4.5 lb can of food costs $11.25. What is the cost per lb?
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(-6)^2 – 20 = 36 – 20 = +16
4.5 lb can of food costs $11.25, that is 11.25/4.5 = $2.5/lb
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