Give the inverse function of each of the following f(x)=x+12
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How can you tell when x and y are not directly proportional?

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

Harry owes the bank money. to repay his debt, he paid $150 back to the bank each month. after 10 months, his remaining debt was $6900. what was the original amount of harry's debt? how long did it take harry to pay back his entire debt?