Answer:
B
Step-by-step explanation:
i estimated this answer
Answer:
Which one do you need the answer for
Step-by-step explanation:
It’d be 3 x 3 and 3 x -y so together it’d be 9 - 3y
Answer:
1) y = (-13/6)x + (37/3)
2) -⅔
3) negative
Step-by-step explanation:
1) slope = (1.5-8)/(5-2) = -13/6
y = (-13/6)x + c
x = 2, y = 8
8 = (-13/6)(2) + c
c = 37/3
y = (-13/6)(6) + (37/3) = -⅔
2) y = (-13/6)x + (37/3)
3) since the slope is negative, the association between the variables is negative
Answer: x = ¹/₂ ± √⁸¹
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Step-by-step explanation:
First write out the equation
x² - x - 20
Now we now write the equation by equating to 0
x² - x - 20 = 0
We now move 20 to the other side of the equation. So
x² - x = 20,
We now add to both side of the equation square of the half the coefficient of the (x) and not (x²) which is (1) . So, the equation now becomes
x² - x + ( ¹/₂ )² = 20 + ( ¹/₂ )²
x² - ( ¹/₂ )² = 20 + ¹/₄
( x - ¹/₂ )² = 20 + ¹/₄, we now resolve the right hand side expression into fraction
( x - ¹/₂ )² = ⁸¹/₄ when the LCM is made 4
Taking the square root of both side to remove the square,we now have
x - ¹/₂ = √⁸¹/₄
x - ¹/₂ = √⁸¹/₂
Therefore,
x = ¹/₂ ± √⁸¹
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