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Dmitry_Shevchenko [17]
3 years ago
11

PLEASE HURRY PLEASE :(

Mathematics
1 answer:
raketka [301]3 years ago
6 0

Answer:

Step-by-step explanation:

height after x seconds = -16x² - 2x + 600

-16x² - 2x + 600 = 450

16x² + 2x - 150 = 0

8x² + x - 75 = 0

Quadratic formula

x = [-1 ± √(1² – 4·8(-75))] / [2·8]

 = [-1 ± √2401] / 16

 = [-1 ± 49] /16

 = 3, -3⅛

-3⅛ is an extraneous solution, so x = 3 seconds.

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Question 10 of 10
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9514 1404 393

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  D. y = -1/3x

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