The pyramid shown has a square base that is 18 inches on each side. the slant height is 16 inches. what is the surface area of the pyramid?

Name these type of angles shown check all that applies

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Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).