Janice is trying to earn $30 to buy a necklace. she has saved $5.25. she earns $2.25 per hour weeding her grandmother's garden and she earns $5.50 per hour selling seashells at the flea market. will janice have enough to buy the necklace if she works in the garden for 2 hours and at the flea market for 4 hours? use the inequality 2.25y + 5.50z + 5.25 ≥ 30.