Luca works at an appliance store. He recently sold 12 appliances, 6 of which were

Mathematics

2 answers:

rosijanka [135]3 years ago

8 0

Answer:

0.50

Step-by-step explanation:

6 out of the total 12 appliances sold were dishwashers, so the experimental probability that the next appliance sold will be a dishwasher is 6/12, or 1/2, or 0.50.

BartSMP [9]3 years ago

7 0

Answer:

1/2

Step-by-step explanation:

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Find a quadratic equation with roots -1, 4i and -1 - 4i

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$\bf \textit{difference of squares}
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(a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)
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\textit{also recall that }i^2=-1\\\\
-------------------------------\\\\
\begin{cases}
x=-1+4i\implies &x+1-4i=0\\
x=-1-4i\implies &x+1+4i=0
\end{cases}
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(x+1-4i)(x+1+4i)=\stackrel{y}{0}
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