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a_sh-v [17]
3 years ago
15

5 The area of a rectangular lawn is 255 m². If its length is 15 m, find its perimeter.​

Mathematics
1 answer:
Marina CMI [18]3 years ago
3 0
Area of a rectangular lawn = l×b

255=15×x

Hence the breadth is 17 m

Hence perimeter =2(l+b)=2(15+17)=64
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I think the question is

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q(x)= ax^2 + bx + k

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x^3 + 2x^2 + cx + 10 = (x-5)(ax^2 + bx+k) = ax^3 + (b-5a)x^2 + (k-5b)x - 5k

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k = 10/-5 = -2

c = k - 5b = 2 - 5(7)= -37

Answer: -37

Check:

(x^2 + 7x - 2)(x - 5) = x^3 + 2 x^2 - 37 x + 10\quad\checkmark




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