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2 years ago

A line passes through (-1,-5) and is perpendicular to the graph of y = -2x + 5. What equation represents the line in

Mathematics

1 answer:

amid [387]2 years ago

8 0

y=(1/2)x -9/2

Step-by-step explanation:

m1.m2= -1 -2.m2= -1 m2 = 1/2

y+5=1/2(x+1)

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Which expression is not equivalent to the other expressions?

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3 years ago

14-(-5x)+2x-(-32)+4z-2x

castortr0y [4]

-5x + 46 +4z
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3 years ago

Elimination method: ax+by=r, -bx+cy=s

Alex17521 [72]

$\left[\begin{array}{ccc}ax+by=r\\\\-bx+cy=s\end{array}\right]$

Isolate x for $ax+by=r$

$x= \frac{r-by}{a} ; a \neq 0$

Subsititute $x= \frac{r-by}{a}$

$-b \frac{r-by}{a} +cy=s$

Isolate r for : $-b \frac{r-by}{a}+cy=s$

$r=- \frac{as-acy-b^2y}{b} ; a \neq 0;b \neq 0$

For x : $\frac{r-by}{a}$

Subsititute r = $- \frac{as-acy-b^2y}{b}$

$x= -\frac{as-acy-b^2y}{b}/a$

$x = \frac{cy-s}{b}$

The solutions to the system of equations are:

$r= -\frac{as-acy-b^2y}{b}$ and <span> $x = \frac{cy-s}{b}$
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hope this helps!

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