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3 years ago

HELP MEEEE!!!!!!!!!!!!!!!!

Mathematics

2 answers:

Savatey [412]3 years ago

8 0

Answer:

X = 19°

Explination:

<h2><u><em>*You need to know that every trangle adds up to 180 degrees!</em></u></h2>

1. Add the 2 (already known) numbers together

2. Subtract the first answer with 180

3. Divide the second answer by 3 to get your answer

Also looks like this:

1. 82° + 41° = 123°

2. 180° - 123° = 57°

3. 57° ÷ 3 = 19°

4. X = 19°

Jlenok [28]3 years ago

7 0

Answer:

19 degrees

Step-by-step explanation:

You know the sum of the interior angles of a triangle is 180 degrees.

So then you can make the equation 82 + 41 + 3x = 180

By solving for x, you get the answer:

123 + 3x = 180

3x = 57

x = 19 degrees

Hope dis helps ya

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Step-by-step explanation:

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Use the data from the table:

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We get the system of three equations:

$\left\{\begin{array}{l}2500a+50b+c=130\\ \\4900a+70b+c=130\\ \\8100a+90b+c=200\end{array}\right.$

Subtract these equations:

$\left\{\begin{array}{l}4900a+70b+c-2500a-50b-c=130-130\\ \\8100a+90b+c-2500a-50b-c=200-130\end{array}\right.\Rightarrow \left\{\begin{array}{l}2400a+20b=0\\ \\5600a+40b=70\end{array}\right.$

From the first equation

$b=-120a$

Substitute it into the second equation:

$5600a+40\cdot (-120a)=70\Rightarrow 800a=70,\\ \\ a=\dfrac{7}{80},\\ \\ b=-120\cdot \dfrac{7}{80}=-\dfrac{21}{2}=-10.5$

So,

$2500\cdot \dfrac{7}{80}+50\cdot (-10.5)+c=130\Rightarrow 218.75-525+c=130\\ \\c=130-218.75+525=436.25$

The quadratic function is

$y=\dfrac{7}{80}x^2-10.5x+436.25\\ \\y=0.0875x^2-10.5x+436.25$

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