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3 years ago

Equivalent Ratios

Mathematics

1 answer:

Zolol [24]3 years ago

8 0

The answer is B 12 your welcome

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If M is the midpoint of XY, find the coordinates of X if M(-3,-1) and Y(-8,6)

vova2212 [387]

$\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
X&({{ a}}\quad ,&{{ b}})\quad 
% (c,d)
Y&({{ -8}}\quad ,&{{ 6}})
\end{array}\qquad
% coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)$

$\bf \left( \cfrac{-8+a}{2}~,~\cfrac{6+b}{2} \right)=\stackrel{M}{(-3,-1)}\implies 
\begin{cases}
\cfrac{-8+a}{2}=-3\\\\
-8+a=-6\\
\boxed{a=2}\\
----------\\
\cfrac{6+b}{2}=-1\\\\
6+b=-2\\
\boxed{b=-8}
\end{cases}$

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2 years ago

Which relationships describe angles 1 and 2?

NikAS [45]

Supplementary angles.

This is because supplementary angles are two angles that add up to 180 degrees, and these two angles would add up to 180 degrees.

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1 year ago

What is the value of z in the equation 2(4z − 3 − 1) = 166 − 46?

shepuryov [24]

Refine $2(4z-3-1)$

$= 2(4z-4)$

Refine : $166 - 16 = 120$

therefore:

$2(z-4) = 120$

Divide both sides by 2 :

$\frac{2(z-4)}{2} = \frac{120}{2}$

$4z-4 = 60$

add 4 to both sides:

$4z-4+4 = 60+4$

$4z = 64$

Divide both sides by 4 :

$\frac{4z}{4} = \frac{64}{4}$

$z = 16$

hope this helps!

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2 years ago

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ale4655 [162]

$2a,2a+2,2a+4,2a+6,2a+8\\\\
2a+2a+2+2a+4+2a+6+2a+8=0\\\\
10a+20= 0\ \ \ \ | subtract\ 20\\\\
10a=-20\ \ \ \ | divide\ by\ 10\\\\
a=-2\\\\
Numers\ are: \ -2,0,2,4,6.$

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If Josie bought a mirror with 5 sides it would be a pentagon

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