Ashirt that normally costs $30 is on sale for $21.75. what percent of the regular price is the sale price? i need asap. also how to solve this. you!

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

Find the axis of symmerty for x y=x squared -4x-8