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matrenka [14]
3 years ago
9

The express elevator in a skyscraper goes up 51 floors in 12¾ seconds. How many floors does the elevator go in 2 seconds? A. 8½

B. 4 C. 8 D. 5
Mathematics
2 answers:
garik1379 [7]3 years ago
6 0

the answer is A. 8 1/2, hope this helps

Marina86 [1]3 years ago
6 0

Answer:

C. 8

Step-by-step explanation:

The elevator goes up 51 floors in 12.75 seconds.

Take 51/12.75 to get the number of floors per second.

51/12.75=4

4 floors multiplied by 2 seconds equals 8.

Therefore, answer C is correct.

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2 years ago
Write the standard form of the equation of the circle with the given characteristics. Center: (3, 5); Solution point: (−2, 17)
Angelina_Jolie [31]

\text{we know that the general equation of the circle is }\\
\\
(x-h)^2+(y-k)^2=r^2\\
\\
\text{where, (h,k) is the center of the circle and r is the radius.}\\
\\
\text{Given that the centered of the circle is at  }(h,k)=(3,5)\\
\text{and a solution point on circle is (-2,17).}\\
\\
\text{so the radius of the circle will be the distance between center and the }

\text{solution point. so using the distance formula, we have}\\
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\text{Radius, }r=\sqrt{(-2-3)^2+(17-5)^2}\\
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\Rightarrow r=\sqrt{25+144}\\
\\
\Rightarrow r=\sqrt{169}\\
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\Rightarrow r=13\\
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\text{Hence using the standard for of circle, equation of circle with center}\\
(h,k)=(3,5) \text{ and radius r=13 is}\\
\\
(x-3)^2+(y-5)^2=(13)^2\\
\\
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3 years ago
EXPLAIN YOUR ANSWER NEED HELP ASAP
Dennis_Churaev [7]
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3 years ago
Can some one help pls
arlik [135]

Answer: <DEF & <JKL

Step-by-step explanation:

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8 0
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