Answer:
90 minutes
Step-by-step explanation:
let x=amount of time it would take for Shelby to knit the scarf

cross multiply
15*30=5x
450=5x
450/5=x
x=90
It would take Shelby 90 minutes to knit a scarf that is 30 inches long.
Subtract 3x from one side so it’ll read Y= -3x +5
It would be a lot better is there was a question to answer. Put a picture of the question please.
Answer:
B its 4 7/8 --------------