Atire shop had to fill 2 1 ⁄2 tires with air. it took a small air compressor 2 1 ⁄2 seconds to fill them up. how long would it take to fill 8 tires?

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

I’m still confused on how to work the percentages

Manuela solved the equation below. what is the solution to manuela’s equation?