Please help with all, I’ll mark brainliest as long as you tell me how you got those answers. :)

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

1: 4 if the wew 35 surfboards at the beach how many were short boards?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10