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Roman55 [17]
3 years ago
13

-2 equals D -7÷7 what does D equal

Mathematics
1 answer:
Elina [12.6K]3 years ago
5 0
"D" = negative 1 (-1)

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Which of the following best describes the equation y= -2/7x +12
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Free Points!!! (25pts)
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2-1=1

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use the discriminant to determine how many and what kind of solutions the quadratic equation x²-x=-1/4 has
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\bf x^2-x=-\cfrac{1}{4}\implies \stackrel{\textit{multiplying by }\stackrel{LCD}{4}}{4x^2-4x=-1}\implies 4x^2-4x+1=0


\bf \qquad \qquad \qquad \textit{discriminant of a quadratic} \\\\\\ \stackrel{\stackrel{a}{\downarrow }}{4}x^2\stackrel{\stackrel{b}{\downarrow }}{-4}x\stackrel{\stackrel{c}{\downarrow }}{+1} ~~~~~~~~ \stackrel{discriminant}{b^2-4ac}= \begin{cases} \boxed{0}&\textit{one solution}\\ positive&\textit{two solutions}\\ negative&\textit{no solution} \end{cases} \\\\\\ (-4)^2-4(4)(1)\implies 16-16\implies \boxed{0}

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3 years ago
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