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iren [92.7K]
3 years ago
12

What's 21% of 1,300 A 2,601 B 1,027 C 62 D 273

Mathematics
1 answer:
Harrizon [31]3 years ago
8 0
\displaystyle 21\% \cdot 1300 \\ \\ \\  \frac{21}{100}\cdot130 = \\\\ \\  \frac{21}{1}\cdot 13= \\ \\\\ 21\cdot13= \\ \\ \\  273 \\ \\ \\ \text{The answer is D.273}
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Answer: ∠DOB: 48°

Step-by-step explanation:

1. we need an equation first. the sum of all angles (108°, n°, 2n°) is equal to 180°. we can depict this with the equation: 108°+2n°+n°=180°

2. now we can solve for the missing variable, n.

108°+3n°=180° → subtract both sides by → 3n°=72° → divide both sides by 3 → n=24°

3. now that we know that n=24°, we can solve the value of ∠DOB. we can see that ∠DOB is 2n° which we just plug the number we got for n into the equation. 2*24=48° meaning ∠DOB is 48°

hope this heped! ♡

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