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4 years ago

Can someone help me please

Mathematics

1 answer:

lana66690 [7]4 years ago

4 0

Polygons's interiro angles make a total of (n-2)*180 degree, n being the number of sides.
in this case, n=6
(6-2)*180=117+124+102+145+107+x
x=125

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EastWind [94]

I hope I help you out

7 0

4 years ago

Select the correct answer.

Ahat [919]

Answer:

Step-by-step explanation:

neither a relation nor a function

6 0

3 years ago

I keep getting confused I don't understand what I keep doing wrong

rosijanka [135]

$\bf \begin{cases}
5x+3y+z=-14\\
2x-2y-z=-13\\
3x+y+3z=-2
\end{cases}$

so.. let's us eliminate, say "z" first, so for that, let's pick the 1s and 2nd equations there $\bf \begin{array}{llll}
5x+3y+z=-14\\
2x-2y-z=-13\\
----------\\
\boxed{7x+y+0\ =-27}
\end{array}$

so, that's our first two-variables resultant

let's pick other two, and again, eliminate the same "z" variable, this time, let's use the 2nd and 3rd equations $\bf \begin{array}{llll}
2x-2y-z=-13&\times 3\implies &6x-6y-3z=-39\\
3x+y+3z=-2\implies &&3x+y+3z\ =-2\\
&&----------\\
&&\boxed{9x-5y+0\ =-41}
\end{array}$

now, we have two two-variables equations, let's use them then
and say, we'll eliminate the "y" variable from them

$\bf \begin{array}{llll}
7x+y=-27& \times 5\implies &35x+5y=-135\\
9x-5y=-41\implies &&9x-5y=-41\\
&&-------\\
&&44x+0=-176
\end{array}
\\\\\\
x=\cfrac{-176}{44}\implies \boxed{x=-4}
\\\\\\
\textit{now, that we know x = -4, let's plug that in }7x+y=-27
\\\\\\
7(-4)+y=-27\implies y=-27+28\implies \boxed{y=1}$

$\bf \textit{now, let's plug those two at }5x+3y+z=-14
\\\\\\
5(-4)+3(1)+z=-14\implies -20+3+z=-14\implies z=-14+17
\\\\\\
\boxed{z=3}$

7 0

3 years ago

Q3 Jason has a collection of 120 baseball cards. He let his friend Justus get 1/4 of his collection and sells 1/5 to ebay. He to

Lady bird [3.3K]

Answer:

Step-by-step explanation:

120 x .25 = 30

120 - 30 = 90

90 x 0.2 = 18

90 - 18 = 72

72 -20 = <u>52</u>

8 0

3 years ago

Read 2 more answers

I need help because I'mnot Smart and don't know how to do this.

Galina-37 [17]

Answer:

Area= 480 because 8x6x10=480

Perimeter= 24 because 8+6+10=24

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers