Mathematics: 12.) find the value of x and y. show all work.

12.) find the value of x and y. show all work. - id12248398, pierceybbpow8o39

Ответ:

afitzgerald

10.03.2022

Mathematics

The value of x = 90°

and the value of y = 43°

Step-by-step explanation:

Since we have given that

In ΔABC,

∠B=∠C=47°

As we know that "Sum of all three angles of a triangle is 180° ".

So, it becomes,

$\angle A+\angle B+\angle C=180\textdegree\\\\\angle A+47\textdegree+47\textdegree=180\textdegree\\\\\angle A+94\textdegree=180\textdegree\\\\\angle A=180\textdegree-94\textdegree\\\\\angle A=86\textdegree\\\\So,\\\\y=\frac{86}{2}=43\textdegree$

Similarly,

Now, in ΔABD,

$\angle A+\angle B+\angle ADB=180\textdegree\\\\43\textdegree+47\textdegree+\angle ADB=180\textdegree\\\\90\textdegree+\angle ADB=180\textdegree\\\\\angle ADB=180\textdegree-90\textdegree\\\\\angle ADB=90\textdegree$

Hence, the value of x = 90°

and the value of y = 43°

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Ответ:

lolz55678

02.10.2020

Mathematics

answer: The mark up percentage was 25% because if you find how much 900 is of 1200 which is 75% and subtract it by 100% which is 25%. To check your work you can multiply 25% * 1200 which equals 300 then add 300 to 900 which Equals 1200.

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12.) find the value of x and y. show all work.

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