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VladimirAG [237]
3 years ago
9

Solve the following system of equations -8x -8y=24 2x + y=-7

Mathematics
2 answers:
tatyana61 [14]3 years ago
8 0

Answer:

x=3.33333

y=0.44444

Step-by-step explanation:

Would equal to

-8x-8y=24 -equation 1

16x+8y = -56  -equation 2 (because of multiplying both sides by 8)

=-24x=80 (minus-ing equation two by equation one, on all sides)

= 24x = -80 (switching around the signs)

x =3.3333

and...

y =0.4444

leonid [27]3 years ago
4 0

Solve the equation using substitution?

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Step-by-step explanation:

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7 0
3 years ago
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(3/7 * (- 5/8)) + (1/3 * 5/6) + |- 1/2 - 1/5|
ANEK [815]

Answer:

Exact Form:

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Decimal Form:

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8 0
2 years ago
What radius of a circle is required to inscribe an equilateral triangle with an area of 270.633 cm2 and an altitude of 21.65 cm?
adoni [48]
1. 
<span>All three angles are equal and their sum is 180. </span>
<span>3 (3x-12) = 180 </span>
<span>9x -36 = 180 </span>
<span>9x = 180+36 </span>
<span>9x = 216 </span>
<span>x = 216/ 9 = 24 </span>

<span>2. </span>
<span>Area of an equilateral triangle = (sqrt(3)/4 ) s^2 = 270.633 </span>
<span>s^2 = 270.633 / [ sqrt(3) /4] </span>
<span>s^2 = (4)(270.633) / sqrt(3) </span>
<span>s^2 = 625 </span>
<span>s = 25 (side) </span>

<span>Follow the procedure in the link: we don't need the altitude. </span>
<span>r = 25/sqrt(3) =14.43 

</span>
7 0
3 years ago
Read 2 more answers
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