15. B
16. D
17. F
18. E
19. A
20. C
Answer: p-19
Explanation:follow order of operations.
First distribute -2 over (p+4). Then multiply that product by 2. This gives you -4p-16-3+5p
Combine like terms.
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However, the dependent variable is the gallons and the independent variable is the number of minutes. This is because the number of gallons that will fill the pool <em>depends</em> upon the amount of time that you allow the water to fill.
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