Trevor is making two types of bracelets. Each Type P bracelet needs 12 inches of leather and 3 inches of string. Each Type Q bracelet needs 4 inches of leather and 18 inches of string. Trevor has 5 yards of leather and 6 yards of string. x equals the number of Type P bracelets Trevor makes. y equals the number of Type Q bracelets Trevor makes. Which system of equations models the constraints on the number of bracelets Trevor can make?A.12x + 4y ≤ 1803x + 18y ≤ 216x ≥ 0y ≥ 0B.12x + 3y ≤ 1804x + 18y ≤ 216x ≥ 0y ≥ 0C.12x + 4y ≤ 53x + 18y ≤ 6x ≥ 0y ≥ 0D.12x + 3y ≤ 54x + 18y ≤ 6x ≥ 0y ≥ 0

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.