cheyfaye4173
20.03.2020 •
Mathematics
The function (x) = 2.4x can be used to represent an exponential growth curve. Which of the following points is NOT on the curve?
A (3, 24)
B (2, 32)
C (3, 128)
D (1, 8)
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Ответ:
Step-by-step explanation:
Part A: Substituting 5 for x in 4x − 1 ≤ 19 yields 4(5) - 1 ≤ 19, which is true. Read, "19 is less than or equal to 19," which is obviously correct.
However, 4x − 1 < 19 reads "19 < 19," which is false.
Part B: I would simply solve 5x + 2 = 47 for x. Subtracting 2 from both sides, we get 5x = 45, so x = 9 is the one and only solution (makes the equation true).