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Tnaaasty8812
18.08.2019 •
Mathematics
Albert photograph has an area of 80 square inches the length of the photo is 1 1/4 the width which of the following to be the dimensions of the photograph
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Ответ:
(length) = 1.25*(width)
replace what the length equals for the length
in the first equation to get:
1.25*(width)*(width) = 80
(width)^2 = 64 [divided 1.25 from both sides]
(width) = 8 [square rooted both sides]
plug this (width) back into the second equation
(length) = 1.25*(8) = 10
so (width) = 8
and (length) = 10
Ответ:
A. 10
Step-by-step explanation:
Those are vertical angles, which means they are equal
70 + x= 8x
we want x alone so subtract
70 +x -x= 8x-x
70 = 7x
divide by x on both sides
x=10