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Find the distance between A (3, 4) and B (15, 13).

I'm confused on this could anyone me and show me what i need to do to solve it.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?