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30.12.2019 •
Mathematics
The functions below represent the amounts of water released from two reservoirs over x weeks.
f(x) = 7x – 8x – 2
g(x) = 4x2 + 3x + 15
which of the following shows the difference in the amounts of water released, h(x) = f(x) – g(x)?
a) h(x) = 7x + 4x2 + 11x – 17
b) h(x) = 7x + 4x2
c) h(x) = 7x + 4x2 – 11x + 17
d) h(x) = 7x – 4x2 – 11x – 17
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Ответ:
The correct answer is D. h(x) = 7x – 4x2 – 11x – 17
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly:
f(x) = 7x – 8x – 2
g(x) = 4x2 + 3x + 15
2. Which of the following answers shows the difference in the amounts of water released, h(x) = f(x) – g(x)?
h(x) = f(x) - g(x)
h(x) = 7x – 8x – 2 - (4x2 + 3x + 15)
h(x) = 7x – 8x – 2 - 4x2 - 3x - 15
h(x) = 7x – 11x – 17 - 4x2
The correct answer is D. h(x) = 7x – 4x2 – 11x – 17
Ответ:
D
Step-by-step explanation: