Someone please answer this I really need help! Combine like terms to create an expression that is equivalent to -4n +3 +9n -4.

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i

Why is partitioning a directed line segment into a ratio of 1: 3 not the same as finding the length of the directed line segment?

5/4 gallons of water fill 5/6 of a bucket how many gallons of water fill the entire bucket