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arlik [135]
3 years ago
15

The sum of two numbers is 56,and their difference is 10.What are the numbers?

Mathematics
1 answer:
Sonbull [250]3 years ago
6 0
So, X + Y = 56, and X - Y = 10.
We can say X = Y +10, so we can also say:
(Y+10) + Y = 56 
2Y + 10 = 56

2Y = 46

Y = 23.

Then we can say 

X - 23 = 10

So X = 33
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Answer:   294.4 m²

<u>Step-by-step explanation:</u>

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1.\ Area(A)=\pi\ r^2\ \bigg(\dfrac{\theta}{360}\bigg)\\\\\\.\qquad \qquad =\pi(11.1)^2\bigg(\dfrac{230}{360}\bigg)\\\\\\.\qquad \qquad =247.3

2.\ \text{Use Law of cosines to find the length of the third side.}\\\text{ Then use Heron's formula to find the Area of the triangle.}\\\\s=\dfrac{11.1+11.1+20.12}{2}=21.16\\\\\\A=\sqrt{s(s-a)(s-b)(s-c)}\\\\.\ =\sqrt{21.16(21.16-11.1)(21.16-11.1)(21.16-20.12)}\\\\.\ =\sqrt{2227}\\\\.\ =47.1

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