WhatTheFangirl2927
12.04.2021 •
Mathematics
3 Some dimensions of a heptagonal prism are shown in the diagram.
8.4 om
13.7 cm
What value best represents the total surface area of the heptagonal prism?
A 806 cm2
B 1,028 cm2
C 1,318 cm2
D 1,062 cm?
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Ответ:
expand the brackets and collect like terms so 6x+15=7x
then -6x to get x=15