In which of the following equations does f= -12

a.108f-6=3
b.72f+9=15
c.118-4f=166
d.127+5f=187

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

What value of s iwhat value of s is a solution to this equation? 27+6s=9ss a solution to this equation? 27+6s=9s

There is a linear relationship between a salesperson sales and her weekly income. if her sales are $200 her income is $500 and if her sales are 1,200 her income is $600.what is the relationship between sales and income