91 in 7 days how many in 11 days

What is the solution of the systems of equations? y=2/3x+3 x=-2

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? )

I'm marking the brainliest and it's 15 points