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2 years ago

Sam wrote this equation for the area of a parallelogram.

Mathematics

2 answers:

prisoha [69]2 years ago

8 0

C- 8.7. Divide 116.58 by 13.4 to get 8.7

Eddi Din [679]2 years ago

5 0

<span>The answer is 8.7. here is how i work it out :)

Just divide 116.58 by 13.4

</span>116.58 / 13.4 = 8.7

so 8.7 is your answer.

Hope this helped :)

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If (−4, 11) and (−6, 5) are the endpoints of a diameter of a circle, what is the equation of the circle?

lora16 [44]

Answer:

A. $(x+5)^2+(y-8)^2=100$

Step-by-step explanation:

1. The standard form of the equation of a circle is $(x-h)^{2} + (y-k)^2=r^2$

2. To find the center we require the midpoint of the 2 given points

center = $[\frac{1}{2}(-4-6),\frac{1}{2}(11+5)]$

=(-5,8)

3. The radius is the distance from the centre to either of the 2 given points calculate the radius using the distance formula

d= $\sqrt{(x_{2}+x_{1})^{2} +(y_{2}-y_{1})^{2}$

let $(x_{1},y_{1})= (-5,8) \\$ and $(x_2,y_2)=(-4,11)$

r= $\sqrt{(-4+5)^2+(11-8)^2} =\sqrt{81+9}=10$

--> $(x-(-5)^2+(y-8)^2=10^2$

--> $(x+5)^2+(y-8)^2=100$

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Solve for y
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