## Algebra 1

D= $0.1 m^{2} + 5m$ A) Substitute the given mass of 60 kg for m in the equation. m=60 D= $0.1 (60)^{2} + 5(60)$ D= 660 mg Therefore, the recommended dosage for a person whose mass is 60 kg is 660 mg. B) mass = 200-lb 1. convert pounds to kilograms. 1 lb=0.45 kg =0.45(200) kg = 90 kg 2. Substitute the mass of 90 kg for m in the equation. m=90 D= $0.1 (90)^{2} + 5(90)$ D= 1260 mg Therefore, the recommended dosage for a 200-lb person is 1260 mg.