The product of two rational numbers is -14/45. If one of the no. is -7/9 find the other no.

Mathematics

2 answers:

icang [17]3 years ago

7 0

Answer:

its 2/5

Step-by-step explanation:

-7/9 x 2/5 = -14/45

leva [86]3 years ago

5 0

Answer:

14.45/7.9=1.82...this is your answer

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Area of a triangle with points at (-9,5), (6,10), and (2,-10)

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First we are going to draw the triangle using the given coordinates.
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Distance from point A to point C:
$d_{AC}= \sqrt{[2-(-9)]^2+(-10-5)^2}$
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$d_{AC}= \sqrt{121+225}$
$d_{AC}= \sqrt{346}$
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Distance from point B from point C
$d_{BC}= \sqrt{(2-6)^2+(-10-10)^2}$
$d_{BC}= \sqrt{(-4)^2+(-20)^2}$
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Now, we are going to find the semi-perimeter of our triangle using the semi-perimeter formula:
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$s= \frac{15.81+18.60+20.40}{2}$
$s= \frac{54.81}{2}$
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Finally, to find the area of our triangle, we are going to use Heron's formula:
$A= \sqrt{s(s-AB)(s-AC)(s-BC)}$
$A=\sqrt{27.41(27.41-15.81)(27.41-18.60)(27.41-20.40)}$
$A= \sqrt{27.41(11.6)(8.81)(7.01)}$
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We can conclude that the perimeter of our triangle is 140.13 square units.