Each side of a 30-sided polygon has one of three lengths. The number of sides with length 8 centimeters (cm) is 5 times the number of sides $n$ with length 3 cm. There are 6 sides with length 4 cm. Which equation must be true for the value of $n$?

MM

Mashaal Masha

Apr 11, 2024

Each side of a 30-sided polygon has one of three lengths. The number of sides with length 8 centimeters (cm) is 5 times the number of sides $n$ with length 3 cm. There are 6 sides with length 4 cm. Which equation must be true for the value of $n$?

Difficulty: Hard

A:

$5n+6=30$

B:

$6n+6=30$

C:

$8n+3n+4n=30$

D:

$8(5n)+3n+4(6)=30$

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