Question

"Nadine's Nursery sells St. Augustine grass seed for $10 per lb, and Zoysia grass seed for $15 per lb. Nancy wants to buy 20 lbs of the grass seed and wants to pay a total of $240. How much of each type should she get?"

Answer 1

n + z = 20--------->n + z = 20

10n + 15z = 240---->n + 1.5z = 24

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.5z = 4

z = 8, n = 12

Nancy should buy 12 pounds of Nadine's grass seed and 8 pounds of Zoysia's grass seed.