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vovikov84 [41]
3 years ago
12

How do you do this ?

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
7 0
So the 3x means three times then u multiply by three
Arlecino [84]3 years ago
3 0
Fg is 9 because 3 times 3 is 9
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Perimeter of rectangle is 48 inches area is 40 inches what are the length of the side
Aloiza [94]
\bf \textit{perimeter of a rectangle}=p=side+side+side+side
\\\\
or\implies p=w+w+l+l\implies p=2w+2l
\\\\
p=2(w+l)\qquad 
\begin{cases}
w=width\\
l=length\\
------\\
p=48
\end{cases}\implies 40=2(w+l)\\\\
-----------------------------\\\\
\textit{area of it}=A=w\cdot l\qquad \begin{cases}
w=width\\
l=length\\
------\\
A=40
\end{cases}\implies 40=wl\\\\
-----------------------------\\\\

\bf thus\qquad 
\begin{cases}
40=2(w+l)\to \frac{40}{2}=w+l\to\frac{40}{2}-l=\boxed{w}
\\\\
40=wl\\
--------------\\
40=\left( \boxed{\frac{40}{2}-l} \right)\cdot l
\end{cases}

solve for "l" to find its length
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3 years ago
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chubhunter [2.5K]

Answer:

Step-by-step explanation:

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Flor and Mo both donated money to the same charity. Flor gave three times as much as Mo. Between the two of them, they donated $
BlackZzzverrR [31]
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Answer:

Step-by-step explanation:

the second one , why? because 7a-12a=-5a

4  - 8 = -4

4 0
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