6x^2 - 8 = 4x^2 + 7x
6x^2 - 4x^2 - 7x - 8 = 0
2x^2 - 7x - 8 = 0
discriminant = b^2 - 4ac; where a = 2, b = -7 and c = -8
d = (-7)^2 - 4(2)(-8)
d = 49 + 64
d = 113
the discriminant is greater than zero, so there are two real roots
Answer: D. 72°
Step-by-step explanation:
The answer would be C) because there are 11 possibilities of who can line up first, and after the first person, 10 possibilities, then 9, and so on. So you would need to multiply 11x10x9x8x...x1.
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Step-by-step explanation:
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Answer:
The two numbers are 13 and 6.
Step-by-step explanation:
x+y=19
x-y=7
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2x=26
x=26/2
x=13
13+y=19
y=19-13
y=6
x=13, y=6.
