Sally can paint a room in 4 hours while it takes steve 9 hours to paint the same room. how long would it take them to paint the room if they worked together

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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