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mestny [16]
2 years ago
12

Solve x2 + 6x = 7 by completing the square. Which is the solution set of the equation?

Mathematics
1 answer:
d1i1m1o1n [39]2 years ago
3 0
For the answer to the question above, from the equation  x^2 - 6x + 7 = 0 , b is equal to -6. The form should become y = (x-(b/2)^2) + c. (<span>b/2)^2 is equal to 9. Hence,
</span>
0 = (x - 3)^2 -9 + 7 
<span>0 = (x - 3)^2 -2
</span>2 = <span>(x - 3)^2

x should be equal to -1.5858 and -4.4142
I hope this helps</span>
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im not sure on how to do this If one angle of a triangle is 30° more than twice another angle, and the third angle is equal to t
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Step-by-step explanation: How do you find the 3rd angle of a triangle?

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The three angles of any triangle add up to 180 degrees. Since you know two angles (35 and 40), add them together, then subtract the total from 180 to determine the degree of the third angle.

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\huge\boxed{\fcolorbox{black}{red}{Answer}}

first let's name a couples of variable

• the number of adults tickets sold: a

• the number of children tickets sold: c

From the problem we know

a + c = 128

and

$5.40c + $9.20a = $976.20

1) solve the equation to alpha

a+c-c = 128 -c

a+0=128-c

a=128-c

2) substitute (128 - c) for a in the second equation and solve to c

$5.40c + $9.20a = $976.20 become

$5.40c + $9.20(128 - c) = $976.20

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$5.40c - $9.20c + $ 1177.6 = $976.20

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