Ashley has 500 songs in his music player. every week he adds 10 songs to his collection. how many songs will he have in his music player after 20 weeks?

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Given: and prove: what is the missing reason in the proof? given transitive property alternate interior angles theorem converse alternate interior angles theorem

When a number is decreased by 9.9% the result is 40. what is the original number to the nearest tenth? super urgent