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carmenguabaoql9kv
31.10.2021 •
Mathematics
Pls help me with the bottom half
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Ответ:
a = 3
Step-by-step explanation:
Calculate the distance d using the distance formula and equate to 4
d =![\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }](/tpl/images/0978/1070/05e0c.png)
with (x₁, y₁ ) = (2, - 1) and (x₂, y₂ ) = (2, a)
d =
=
=
= a + 1 then
a + 1 = 4 ( subtract 1 from both sides )
a = 3