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Alex777 [14]
3 years ago
15

Find the width of rectangle if it's area is (3x^2 + 9xy + 6y^2 ) square centimeters .

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
5 0
Given:
Length = 3x + 6y cm
Area = 3x² + 9xy + 6y²

Because Area = Width * Length, therefore
Width = Area/Length
           = (3x² + 9xy + 6y²)/(3x + 6y).

Width = Width= \frac{3( x^{2} +3xy+2 y^{2}) }{3(x+2y)}
Width=\frac{(x+y)(x+2y)}{x+2y} =x+y

Answer:  x+y
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1 question, please explain your answer and i will mark you brainly ! Thank you for your time.
adell [148]
\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad  y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad  variation
\end{array}\\\\
-------------------------------\\\\
\textit{\underline{time} varies directly with \underline{distance}}\qquad t=kd
\\\\\\
\textit{we also know that }
\begin{cases}
t=\stackrel{seconds}{10}\\
d=\stackrel{miles}{2}
\end{cases}\implies 10=k2\implies \cfrac{10}{2}=k

and surely you know how much that is.
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3 years ago
Mia is factoring the polynomial x2 + 4x – 12. She uses the steps shown. In which step did Mia make an error?
Gala2k [10]
While Mia's answer is not shown, the <u>correct process</u> is:

This trinomial is in the form ax²+bx+c.  In this case, x=1.  We want factors of c (in our trinomial, -12) that sum to b (in our trinomial, 4).  

To make -12, we can multiply:
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The correct set of factors are the ones that sum to positive 4.  The only ones that do this are -2 and 6.  These are the roots, so factored form is:
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Barbara plotted an elevation below sea level on a number line and labeled it A. She plotted Point B above 0, a distance that is
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