WILL MARK BRAINLIEST IF CORRECT Which expression would be easier to simplify if you used the associative property to change the grouping?

How do i do this activity, is appreciated

When are triangles considered similar? a. corresponding angles are equal andcorresponding sides are proportionalb. corresponding angles are proportional andcorresponding sides are equalc. corresponding angles are equal orcorresponding sides are proportionald. corresponding angles are proportional orcorresponding sides are equal select the best answer from the choices providedmark this and retumsave and exitnext

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