Answer:
Step-by-step explanation:
-7
-20 × -7 = 140
140 × -7 = -980
see this attachment ☝☝☝
-1 = (-3/5)-15 + b
(I don't know the y-intercept bc I don't have a graphing calc but to find it out you just graph it and then see where the line passes thru the y axis)
go follow this website it has a full answer brainly.com/question/2803975