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2 years ago

10

Help me plsss pls psl

2 answers:

Taya2010 [7]2 years ago

7 0

Answer: A, B, D

it can’t be “C” because that would be equal to 40%

Masja [62]2 years ago

6 0

It’s b
it’s not A because it’s not percentages it’s decimals using boxes as an example

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3 years ago

find the coordinates of the point p that divides the direct line segment from A to B in the given ratio A ( -9,5) B (15,-11)7 to

hoa [83]

$\bf ~~~~~~~~~~~~\textit{internal division of a line segment}
\\\\\\
A(-9,5)\qquad B(15,-11)\qquad
\qquad \stackrel{\textit{ratio from A to B}}{7:1}
\\\\\\
\cfrac{A\underline{p}}{\underline{p} B} = \cfrac{7}{1}\implies \cfrac{A}{B} = \cfrac{7}{1}\implies 1A=7B\implies 1(-9,5)=7(15,-11)\\\\
-------------------------------$

$\bf p=\left(\cfrac{\textit{sum of "x" values}}{\textit{sum of ratios}}\quad ,\quad \cfrac{\textit{sum of "y" values}}{\textit{sum of ratios}}\right)\\\\
-------------------------------\\\\
p=\left(\cfrac{(1\cdot -9)+(7\cdot 15)}{7+1}\quad ,\quad \cfrac{(1\cdot 5)+(7\cdot -11)}{7+1}\right)
\\\\\\
p=\left(\cfrac{-9+105}{8}~~,~~\cfrac{5-77}{8} \right)\implies p=\left( \cfrac{96}{8}~~,~~\cfrac{-72}{8} \right)
\\\\\\
p=(12~,~-9)$

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3 years ago