Julia is selling bracelets (b) for$3 each and necklace for $8 each. write an inequality to represent all of the combination of bracelets and necklaces julia could sell to make at least $150?

Since you did not supply a variable symbol to represent necklaces, we will use (N) to represent necklaces.
3b +8n ≥ 150
This inequality represents all of the possible combinations of necklaces and bracelets that Julia could sell to make $150 or more.