Evilate the functions

f(x+7)=

How many $20 bills do you need to have to make $280

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? )

Rounded to the nearest tenth, what is the value of x