To answer, substitute the value of y in the second equation to that of the first.
x² + (x + 2)² = 100
Simplification leads to,
x² + x² + 4x + 4 = 100
2x² + 4x + 4 = 100
x² + 2x - 48 = 0
The roots of this equation are x = 6 and x = -8. Thus, the answer is letter C.
Answer:
cubic yards
Step-by-step explanation:
Volume = length * width * height
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4x + 3y = 16
x = -3 / 4 y + 4
y = -4 / 3 x + 16 / 3
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y = x + 3
x = y - 3
y = x + 3
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-2x+1=-x^2+4
X^2 - 2X + 1 - 4 =0
X^2-2X-3=0
discriminant= (-2)^2 - 4(-3)(1)
=16
D1 = {-(-2)+√16}/2
D1=(2+4)/2
=6/2
D1=3.
D2={-(-2)-√16}/2
=(2-4)/2
=-2/2
D2= -1
the solutions are {-1 ; 3 }
so A) x= -1,3
Answer:
the probabily is 3/4 that she will not land on red
Step-by-step explanation:
there are three other colors, making red have a 3/4 chance of not being picked