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poonwagon994
30.01.2021 •
Mathematics
What is the x value of the vertex of f(x) = 2x^2 - 4x + 9
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Ответ:
(1, 7)
Step-by-step explanation:
a = 2, b = -4, c = 9
x = -b/2a
x = 4/2(2)
x = 1
plug 1 in for 'x' into 2x² - 4x + 9 to get the y-value
2(1) - 4(1) + 9
2 - 4 + 9 = 7
Ответ:
Oar City
Step-by-step explanation:
Divide the first expense (27) by the time you ride (3 hours) and you get 9 dollars an hour
Divide the second expense (45) by the time you ride (9 hours) and you get 5 dollars an hour