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loris [4]
3 years ago
9

2(3u+8)=40 two times three u plus eight equals forty

Mathematics
1 answer:
densk [106]3 years ago
5 0

Answer:

Given,

2(3u+8)=40

(3u + 8)= 40/2

3u +8= 20

3u = 20-8

u =12/3

u=4

Value of u is 4

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Solve by completing the square? Could you please work it out step-by-step?
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16 n^2 -10n + 129 = 8n^2 -8

We collect the terms:
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The steps for completing the square:

1) Move the "non X" (or "non N") term to the right:

8n^2 -10n  = -137

<span>2)<span> Divide the equation by the coefficient of N² which in this case is 8
n^2 -1.2n = </span></span><span><span>-17.125 </span>

3) Take the coefficient of "N"; divide it by 2; square it; add it to both sides of the equation.
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</span>
n^2 -1.2n +.36 = <span>-17.125 +.36

Take the square root of both sides:</span>
(n-.6)*(n-.6) = sq root( <span> <span> <span> -16.765 </span> </span> </span> )
That's about as far as I can go.

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4 years ago
In (Triangle)QRS, <br> Please explain
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Distance = \sqrt{(y_2-y_1)^2+(x_2-x_1)^2}

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