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3241004551 [841]
3 years ago
12

B^2-4ac would equal: y=2x^2-x-3

Mathematics
2 answers:
motikmotik3 years ago
6 0

Answer:

25

Step-by-step explanation:

In this equation, ax^2+bx+c, b = -1, a = 2, and c = -3. Solving, (-1)^2 - 4(2)(-3) = 1 - (-24), or 25.

ra1l [238]3 years ago
6 0

Answer:

25

Step-by-step explanation:

y = 2x² - x - 3

A = 2 , B = -1 , C = -3

B² - 4AC

(-1)² - 4(2)(-3)

1 + 24

25

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6 0
3 years ago
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5 0
3 years ago
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At 5 a.m., the temperature at an airport was −9.4°F . Six hours later, the temperature was 2.8°F . Which expression represents t
RoseWind [281]
Let x = the number of hours since 5 a.m.
Let y = temperature, °F

Let the total temperature change be modeled by the expression
y =  ax + b

At 5 a.m., x = 0 and y = -9.4°F. Therefore
b = -9.4

When x = 6 hours, y = 2.8°F. Therefore
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Answer:
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