Two angles are supplementary they have measures of (7x+2) and (3x-2) , respectively what is the x value

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?