Answer:
Option B.
Step-by-step explanation:
It is given that Lisa needs 250 yards of yarn to knit a hat.
She has 185 yards of yarn and needs to buy the rest.
Let y to be the number of yards of yarn she needs to buy.
Number of yards of yarn she needs to buy + Number of yards of yarn she has = 250
[tex]y+185=250[/tex]
Subtract 185 from both sides.
[tex]y+185-185=250-185[/tex]
[tex]y=65[/tex]
The required equation is [tex]y+185=250[/tex] and solution is [tex]y=65[/tex].
Therefore, the correct option is B.
