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lara [203]
3 years ago
9

When completing the square, what value must you add to both sides of the equation to create a perfect square trinomial?

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
6 0
Notice that half of the coefficient of x is (1/2)(-4), or -2.

Then x^2 - 4x   becomes
         x^2 - 4x + 4 - 4 = 0, or (x -2)^2 = 4.   Then x = -2 plus or minus 2, and the two roots are 0 and -4.

Thus, add 4 to both sides to obtain x^2 - 4x + 4 = 4.
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How do u find the area of a regular polygon? And can someone help me with question 2
Nonamiya [84]
A regular polygon<span> is equilateral (it has equal sides) and equiangular (it has equal angles). To </span>find the area of a regular polygon<span>, </span>you<span> use an apothem — a segment that joins the </span>polygon's<span> center to the midpoint of any side and that is perpendicular to that side (segment HM in the following figure is an apothem).

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6 0
3 years ago
Sam wrote this equation for the area of a parallelogram.
prisoha [69]
C- 8.7. Divide 116.58 by 13.4 to get 8.7
8 0
3 years ago
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Variables x and y are in direct proportion, and y = 48n when x = 16n. Which value of k correctly relates x and y in the equation
ella [17]
You want k.
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3 0
3 years ago
The variable z is directly proportional to x, and inversely proportional to y. When x is 20 and y is 6, z has the value 66.66666
sergejj [24]

Answer:

41.667 to the nearest thousandth.

Step-by-step explanation:

z = kx/y where k is the constant of proportionality.

Inserting the given values:

66.666666666667 = k*20/6

20k = 6*66.666666666667

k = 6*66.666666666667 / 20

=  20

So the equation of variation is z = 20x /y

When x = 25 and y = 12:

z = 20*25/12

= 41.666666666667.

6 0
3 years ago
2 divion 18 I need helpppppppp
Gnoma [55]
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