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anastassius [24]
4 years ago
14

Which equation is the direct variation equation if f(x) varies directly with x and f(x) =-12 when x=6

Mathematics
1 answer:
Taya2010 [7]4 years ago
5 0

Answer:

f(x) = -2x

Step-by-step explanation:

Direct variation equation is y= kx, or f(x)=kx

f(x)= -12, x=6

f(x)=kx

-12 = k*6

k= - 2

f(x) = -2x

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Answer:

Column is the up and down or vertical row is the side to side or horizontal table is an assembly of columns and rows cell is where a column and row meet

Step-by-step explanation:

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What is the solution to this equation?<br> -1/5(x+1 1/4)=-2 1/2
lubasha [3.4K]

\large\displaystyle\text{$\begin{gathered}\sf -\frac{1}{5}\left(x+1\frac{3}{4}\right)=-2\frac{1}{2}    \end{gathered}$}

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\large\displaystyle\text{$\begin{gathered}\sf \bf{-4\left(x+\frac{4+3}{4}\right)=-10(2\times2+1)  } \end{gathered}$}

Add 4 and 3 to get 7.

\large\displaystyle\text{$\begin{gathered}\sf \bf{-4\left(x+\frac{7}{4}\right)=-10(2\times2+1)  } \end{gathered}$}

Use the distributive property to multiply −4 times x 4/7.

\large\displaystyle\text{$\begin{gathered}\sf \bf{-4x-4\times\left(\frac{7}{4}\right)=-10(2\times2+1)  } \end{gathered}$}

Multiply −4 by 4/7.

\large\displaystyle\text{$\begin{gathered}\sf \bf{-4x-7=10(2\times2+1) \ \ \to \ \ [Multiply \ 2\times2] }  \end{gathered}$}

\large\displaystyle\text{$\begin{gathered}\sf \bf{-4x-7=10(4+1) \ \ \to \ \ [Add] }  \end{gathered}$}

\large\displaystyle\text{$\begin{gathered}\sf \bf{-4x-7=10\times5 \ \ \to \ \ [Multiply] }  \end{gathered}$}

\large\displaystyle\text{$\begin{gathered}\sf \bf{-4x-7=-50 } \end{gathered}$}

Add 7 to both sides.

\large\displaystyle\text{$\begin{gathered}\sf \bf{-4x=-50+7 \ \ \to \ \ [Add] } \end{gathered}$}

\large\displaystyle\text{$\begin{gathered}\sf \bf{-4x=-43 } \end{gathered}$}

Divide both sides by −4.

\large\displaystyle\text{$\begin{gathered}\sf \bf{x=\frac{-43}{-4} } \end{gathered}$}

The fraction \bf{\frac{-43}{-4}} can be simplified to \bf{\frac{43}{4}} by removing the negative sign from the numerator and denominator.

\large\displaystyle\text{$\begin{gathered}\sf \bf{x=\frac{43}{4} } \end{gathered}$}

simplify

\large\displaystyle\text{$\begin{gathered}\sf \bf{x=10\frac{3}{4} \ \ \to \ \ \ Answer } \end{gathered}$}

<h2>{ Pisces04 }</h2>
8 0
2 years ago
Read 2 more answers
Help me please!!!!! Help
Rus_ich [418]

Answer:

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Step-by-step explanation:

Plug in the values of x (the domain numbers) into the equation to solve for the range values (y)

For example, for the x value of -4

y= 2(-4)+1

y= -8+1

y= -7

7 0
3 years ago
Which of the following equations represents the line with a slope of negative 1/7 and a y-intercept of negative 3?
fenix001 [56]
The answer is D. The slope is -(1/7) and the b value refers to the y intercept, which is 3.
8 0
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