The rectangle below has an area of x^2-x-72x 2
−x−72x, squared, minus, x, minus, 72 square meters and a length of x+8x+8x, plus, 8 meters.
What expression represents the width of the rectangle?

\text{Width} =Width=start text, W, i, d, t, h, end text, equals
meters

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Ответ:

ROBIOX5934

22.06.2022

Mathematics

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

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

hope this helps!

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The rectangle below has an area of x^2-x-72x 2 −x−72x, squared, minus, x, minus, 72 square meters and a length of x+8x+8x, plus, 8 meters. What expression represents the width of the rectangle? \text{Width} =Width=start text, W, i, d, t, h, end text, equals meters