Solve the simultaneous equations

3x + 2y = 30
3x - y = 21

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

Hi, can anyone show me how to do this problem? 100 points for this. in advance

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show