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Fofino [41]
3 years ago
6

HELP PLEASE (-4)-(-2)-{(-5)-[(-7)+(-3)-(-8)]}

Mathematics
2 answers:
zaharov [31]3 years ago
8 0

Answer:

answer is 1

Step-by-step explanation:

laila [671]3 years ago
4 0

Answer:

(-4)-(-2)-{(-5)-[(-7)+(-3)-(-8)]}

=-4+2-{-5-[-7-3+8]

=2-{-5-[-2]}

=2-{-5+2}

=2+3

=5

Step-by-step explanation:

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A triangle has an area of 30 cm2. The base and height are scaled by a factor of 3. What is the are of the resulting triangle.
Lera25 [3.4K]
The base and height scaled to some factor, simply means,
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\bf \begin{cases}
A=\cfrac{1}{2}bh
\\\\
\textit{now, scaling "b" and "h" by 3}
\\\\
A=\cfrac{1}{2}\cdot 3b\cdot 3h\to \cfrac{1}{2}\cdot 9bh
\\\\
A=\cfrac{9}{2}bh\to 9\left(\cfrac{1}{2}bh  \right)\\
--------------\\
9\left(\cfrac{1}{2}bh  \right)\textit{ is really 9 times }\cfrac{1}{2}bh
\\\\
\textit{whatever the value of }\cfrac{1}{2}bh \textit{may be}
\end{cases}

-------------------------------------------------------------------------

\bf A=\cfrac{1}{2}bh\qquad 
\begin{cases}
b=2\\
h=3
\end{cases}\implies A=\cfrac{1}{2}\cdot 2\cdot 3\to 3
\\\\\\
\textit{now, let us scale "b" and "h" by 3}
\\\\
A=\cfrac{1}{2}\cdot  3b\cdot  3h\qquad 
\begin{cases}
b=2\\
h=3
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\\\\\\
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Bad White [126]
It would be an acute isosceles triangle
8 0
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