The diameter of a circle is 15 ft. Find its circumference in terms of \piπ.

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

Answer question above and explain each step : )

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?