Week 10 Day 1 Opener

Diego bought some raisins and walnuts to make trail mix. Raisins cost $4 a pound and walnuts cost $8 a pound. Diego spent $15 on both ingredients. Decide if each pair of values could be a combination of raisins and walnuts that Diego bought. 4 pounds of raisins and 2 pounds of walnuts

1 pound of raisins and 1.5 pounds of walnuts

2.25 pounds of raisins and 0.75 pounds of walnuts

3.5 pounds of raisins and 1 pound of walnuts