There were three concerts in lakeside. the first concert had 953 people in the attendance. the second and third concerts each had a full house of 1,100.what was the average number of people at the three concerts

Can someone answer these problems for me

The measure of an angle is 117°. what is the measure of a supplementary angle?

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.