The price of a movie ticket in 2009 was 6.75 and the price of a movie ticket in 2020 is 13.50 find the percent increase in movie ticket costs. PLEASE HELP.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

Kerion has a beaded necklace business. she can make 12 necklaces is 2 hours. how long will it take her to make 9 necklaces?