2 years ago

In the diagram, LaTeX: \Delta ABC\cong\Delta DFE

Mathematics

1 answer:

leonid [27]2 years ago

8 0

Answer:

x = 13

y = 8

Step-by-step explanation:

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DiKsa [7]

Answer:

90 shoppers have cookies or fruits as their favorite snack.

Step-by-step explanation:

First add 15% and 15% to get a total of 30% then multiply 300 by 30 to get 9000 and divide that by 100 to get your answer of 90.

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3 years ago

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Find z1z2 if z1 = 2/5(cos63° + isin63°) and z2 = 10/3(cos117° + isin117°).

Airida [17]

Answer:

-10/3 is the answer

Step-by-step explanation:

Given are two complex numbers as

$z1=\frac{2}{5} (cos63 + isin63)\\z2=\frac{10}{3} (cos 117 + isin117})$

Recall Demoivre theorem as

(cosA+isinA)(cos A+isin B) = cos(A+B)+isin(A+B)

Hence here we have sum of angles as

A+B = 63+117 =180

$z1z2=\frac{2}{5} \frac{10}{3} (cos180+isin180)$

= $\frac{-10}{3}$

Since sin180=0 and cos 180=-1

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3 years ago

Im stuck lol, I'm doing algebra 1, the answer is supposed to be <br><img src="https://tex.z-dn.net/?f=27%20%5Cfrac%7B3%7D%7B8%7D

maxonik [38]

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3 years ago

I am stuck between two

Marina86 [1]

Answer:

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Step-by-step explanation:

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3 years ago

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Please help !!!!!!!!

Vsevolod [243]

Answer:

x=3 y=11

Step-by-step explanation:

2x+3=9

2x=6

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2 years ago