Mathematics: Please show me the steps to solve this 2n^2 = -144

(a) ; 9 mails.(b) (1). Step-by-step explanation:We have been given that Lee is sending out 32 birthday party invitations. She gives 5 invitations to her mom to give to family members. The invitations left after 5 invitations would be .Lee mails a third of the rest. The number of invitations sent by Lee would be .Therefore, Lee has already mailed 9 invitations.(b). To find the number of invitations that still need to be sent out, we will subtract the number of mails sent by Lee and her mother from...

Please show me the steps to solve this 2n^2 = -144

Ответ:

lnorred2

09.09.2021

Mathematics

$\large \boldsymbol{} \pmb{6\sqrt{2} i}$

Step-by-step explanation:

$\large \boldsymbol{} \bf i=\sqrt{-1} \\\\ 2n^2=-144 \\\\n^2=-72 \\\\n=6\sqrt{2} i$

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Ответ:

anthonygarib24

09.09.2021

Mathematics

$\\ \sf\longmapsto 2n^2=-144$

$\\ \sf\longmapsto n^2=\dfrac{-144}{2}$

$\\ \sf\longmapsto n^2=-72$

$\\ \sf\longmapsto n=\sqrt{-72}$

$\\ \sf\longmapsto n=8.4i$

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Ответ:

tiffanyrhoda

11.05.2021

Mathematics

(a) $\frac{32-5}{3}$ ; 9 mails.

(b) (1). $32-5-\frac{1}{3}(32-5)$

Step-by-step explanation:

We have been given that Lee is sending out 32 birthday party invitations. She gives 5 invitations to her mom to give to family members. The invitations left after 5 invitations would be 32-5 .

Lee mails a third of the rest. The number of invitations sent by Lee would be $\frac{32-5}{3}$ .

$\text{Invitations mailed by Lee}=\frac{32-5}{3}$

$\text{Invitations mailed by Lee}=\frac{27}{3}$

$\text{Invitations mailed by Lee}=9$

Therefore, Lee has already mailed 9 invitations.

(b). To find the number of invitations that still need to be sent out, we will subtract the number of mails sent by Lee and her mother from 32 invitations.

$\text{Number of invitations that still need to be sent out}=32-5-\frac{1}{3}(32-5)$

Therefore, our required expression would be $32-5-\frac{1}{3}(32-5)$ and 1st option is the correct choice.

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Please show me the steps to solve this

2n^2 = -144

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