Answer for 5(-x +2) + 3x +5 = 11

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

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

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )