X2 - 121 can someone help

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

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

Find two numbers if their sum is 91 and the ratio is 6: 7?