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Gnom [1K]
3 years ago
10

What number should be added to both sides of the equation to complete the square? x^2-40x=0

Mathematics
2 answers:
mylen [45]3 years ago
8 0

Answer:

+40

Step-by-step explanation:

leva [86]3 years ago
5 0

Answer:

400

Step-by-step explanation:

When completing the square, all you need to do is take half the coefficient of x, and square it.

In this case the coefficient of x is -40, and half of that is -20.  -20 squared is 400, and that is what you need to add to both sides.

Note that when completing the square, you'll always be adding a positive number unless coefficient you're working with is an imaginary or complex number.

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3 years ago
What is the value of x in the equation 3x + 3 = 15 + 9x
Leto [7]

x=-2 is your anwser for this problem

3 0
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Read 2 more answers
At a pizzeria, a medium pizza which has diameter of 12 inches sells for $6.00 and a large pizza which has a diameter of 16 inche
Sidana [21]
We are comparing areas, so square of the linear dimension
Relative cost per unit area
12^2/6=24
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Since 24<25.6, the 12" pizza is a better deal.

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5 0
3 years ago
Diedre drew a quadrilateral with 4 right Angles and opposite sides of the same length. Name all the kinds of polygons that could
Aleksandr-060686 [28]

Answer:

The answer to the question is

The kinds of polygons that could be Diedre's quadrilateral are rectangle and square

Step-by-step explanation:

We  note the conditions of the polygon as thus

Number of sides = 4, Which include trapezoid, square, rectangle

Size of angles = 90 ° which eliminates trapezoid

Sizes of opposite sides = Equal opposite sides, includes square and rectangle

With the above we conclude that the possible polygons in Diedre's quadrilateral are rectangle and square

8 0
3 years ago
Solve for d. | - 2d|&lt;10
Romashka-Z-Leto [24]

 Your question: Find D in | - 2d|<10

==========================================================

SOLVING....

Solve the absolute value

|−2d| < 10

     =

−2d < 10

    or

−2d > −10

Solve −2d < 10 for D

Divide each side by -2

-2d ÷ -2 < 10 ÷ -2

d > -5

Now Solve −2d > −10

Divide each side by -2

-2d ÷ -2 > -10 ÷ -2

d < 5

So D is d < 5  and d > -5

7 0
3 years ago
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