Eliza's birthday is on February 29th. If she celebrated her 7th birthday in 2016, how old is she and what year was she born?

Mathematics

1 answer:

solong [7]3 years ago

7 0

Answer:

She is 11, turning 12. She was born in 2009.

Step-by-step explanation:

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the midpoint of kl is m(4.8, -7.8). one endpoint is l(0.6, -5.6). find the coordinates of the other endpoint k.

Vera_Pavlovna [14]

$\bf ~~~~~~~~~~~~\textit{middle point of 2 points }\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&k&(~ x &,& y~) 
% (c,d)
&l&(~ 0.6 &,& -5.6~)
\end{array}\qquad
% coordinates of midpoint 
\left(\cfrac{ x_2 + x_1}{2}\quad ,\quad \cfrac{ y_2 + y_1}{2} \right)$

$\bf \left( \cfrac{0.6+x}{2}~~,~~\cfrac{-5.6+y}{2} \right)~=~\stackrel{midpoint}{(4.8~,~-7.8)}\quad 
\begin{cases}
\cfrac{0.6+x}{2}=4.8\\\\
0.6+x=9.6\\
\boxed{x=9}\\
---------\\
\cfrac{-5.6+y}{2}=-7.8\\\\
-5.6+y=-15.6\\
\boxed{y=10}
\end{cases}$

8 0

3 years ago

The slope of the line

NNADVOKAT [17]

Answer:

Step-by-step explanation:

$\frac{y_{2}-y_{1} }{x_{2}-x_{1} }= \frac{8-2}{4-2} =\frac{6}{2} =3$