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3 years ago

13

What is f(-2)? O-3 O-1 O1 03

2 answers:

Leni [432]3 years ago

7 0

Answer:

− 2 f

Step-by-step explanation:

Move − 2 to the left of f .

Natasha2012 [34]3 years ago

5 0

Answer:

<h3>.May be it is -1</h3>

Step-by-step explanation:

<h3>There is no formula</h3>

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3 years ago

20 ÷ ........... = (-2)

nika2105 [10]

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vagabundo [1.1K]

$\bf \begin{array}{lccclll}
&\stackrel{lb}{amount}&\stackrel{lb}{price}&\stackrel{total}{price}\\
&------&------&------\\
\textit{plain popcorn}&p&3&3p\\
\textit{caramel popcorn}&c&2.2&2.2c\\
-------&------&------&------\\
mixture&10&2.5&25
\end{array}$

so hmm whatever "p" and "c" are, we know that p + c = 10.

and we also know that 3p + 2.2c = 25

thus

$\bf \begin{cases}
p+c=10\implies \boxed{c}=10-p\\
3p+2.2c=25\\
----------\\
3p+2.2\left(\boxed{10-p} \right)=25
\end{cases}
\\\\\\
3p+22-2.2p=25\implies 3p-2.2p=25-22\implies 0.8p=3
\\\\\\
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3 years ago