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Brilliant_brown [7]
3 years ago
6

Numbers:20 & 21 Please help me!!!!

Mathematics
1 answer:
nexus9112 [7]3 years ago
6 0
Diameter of a human hair=0.000099 m=9.9 *10⁻⁵ m
Circumference at the equator=40,100,000 m=4.01 *10⁷ m
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2n-7/3 = 15 solve for n
WITCHER [35]
2n- \frac{7}{3} =15 
2n- \frac{7}{3} =15  common denominator is 3
3(2n- \frac{7}{3} )=3*15 distributhing  3 through parantheses
3*2n- \frac{3*7}{3}=3*15
3*2n-7=3*15
6n-7=45   add7
6n=45+7
6n=52 divide by 6
n= \frac{52}{6} simplify
n=8 \frac{2}{3} ⇒ \frac{26}{3}
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