The museum charges $4.50 per person for a 2h tour with fewer than 20 people. If 20 or more people take the tour the charges is 3.75 per person. Of the 23 people in today's tour, 17 had paid 4.50 in advance. How much money will the museum return as a refund

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Which of the following is true for the relation f(x)=2x^2+1

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?