The owner of Wil's Fish Market orders cod and tuna. He wants to buy at least 40 pounds of fish, but cannot spend more than $400. Cod is $5 per pound and tuna is $8 per pound. Let x = amount of cod (in pounds) and y = amount of tuna (in pounds).

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step-by-step explanation:

step-by-step explanation:

1. 2

2. 11

3. 5

4. 6

5. 7

6. 5

7. -1

8. 1

step-by-step explanation:

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629