3 years ago

Which choice is the most efficient first step to solve this set of equations?

Mathematics

2 answers:

Nastasia [14]3 years ago

8 0

Answer:

x + 2x = 30 is the correct answer.

harina [27]3 years ago

3 0

2x + x + y = y + 30 I think.

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Find the zeros of the polynomial function and state the multiplicity of each.

zheka24 [161]

$\bf f(x) = 4(x + 7)^2(x - 7)^3\implies 0 = 4(x + 7)^2(x - 7)^3
\\\\\\
0=(x+7)^2(x-7)^3\implies 
\begin{cases}
0=(x+7)^7\\
\qquad 0=(x+7)(x+7)\\
\qquad -7=x\\
\qquad -7=x\\
----------\\
0=(x-7)^3\\
\qquad 0=(x-7)(x-7)(x-7)\\
\qquad 7=x\\
\qquad 7=x\\
\qquad 7=x
\end{cases}$

the -7 is found there twice, so it has a multiplicity of 2
the +7 is there thrice, so it has multiplicity of 3

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3 years ago

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Ilia_Sergeevich [38]

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3 years ago

The price of a technology stock has dropped to $9.79 yesterday. Today. the price fell to $9.68. Find the percentage decrease.

Citrus2011 [14]

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Explanation in image