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4 years ago

what is the answer that needs to put in to make the equation work: -13/20 divided by blank equals 0.26

Mathematics

1 answer:

Gwar [14]4 years ago

3 0

The answer is -2.5.. I hope its correct.

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What is the perimeter of a polygon with vertices at (−2, 1) , (−2, 4) , (2, 7) , (6, 4) , and (6, 1) ?

alekssr [168]

First we need the distances of the sides of the polygon, because perimeter = sum of all sides.
$d = \sqrt{{(y2 - y1)}^{2} + {(x2 - x1)}^{2} }$
$d1 = \sqrt{{(1 - 4)}^{2} + {( - 2 - - 2)}^{2} } \\ = \sqrt{{(- 3)}^{2} + {(0)}^{2} } = \sqrt{9} \: = 3$
$d2 = \sqrt{{(4 - 7)}^{2} + {( - 2 - 2)}^{2} } \\ = \sqrt{{(- 3)}^{2} + {( -4)}^{2} } = \sqrt{9 + 16} \\ = \sqrt{25} \: = 5$
$d3 \: = \sqrt{{(7 - 4)}^{2} + {(2 - 6)}^{2} } \\ = \sqrt{{(3)}^{2} + {( - 4)}^{2} } = \sqrt{9 + 16} \\ = \sqrt{25} \: = 5$
$d4 = \sqrt{{(4 - 1)}^{2} + {(6 - 6)}^{2} } \\ = \sqrt{ {(3)}^{2} + {(0)}^{2} } = \sqrt{9} \: = 3$
$d5 = \sqrt{{(1 - 1)}^{2} + {(-2 - 6)}^{2} } \\ = \sqrt{ {(0)}^{2} + {( - 4)}^{2}} = \sqrt{16} \: = 4$
Now, we add all sides for the perimeter:
p = d1 + d2 + d3 + d4 + d5
p = 3+5+5+3+4 = 20 units

5 0

3 years ago

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Find the measure of ∠C. A) 10° B) 14° C) 20° D) 30°

rosijanka [135]

The answer is C) 20°. This is because 73 + 87 = 160, and there are 180° in a triangle so 180 - 160 = 20. I hope this helps!

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3 years ago

A plane has 360 total seats, which are divided into economy class and business class. For every 12 seats in economy class, there

Zanzabum

There is 260 economy seats, and 100 businesses class —- Working out 13+5 = 18, 360/18 = 20, 20x13 =260 amd 5x20 = 100

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3 years ago

A comet is estimated to be about 960,000,000 km from Earth. Write this distance in scientific notation. [?] × 10 km Enter 13

Kitty [74]

Answer:

$(9*10^{9})( 6*10^{8})$ or 9.6×10^8

Step-by-step explanation:

The answer is written above.

Hope this helps!

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2 years ago

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Pavlova-9 [17]

Answer:

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Step-by-step explanation:

so,

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2 years ago