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Anna [14]
2 years ago
14

PLEASE HELP, I NEED THIS QUICK!

Mathematics
1 answer:
denis23 [38]2 years ago
8 0

Answer:

Step-by-step explanation:

becasue  you can square a negative number

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Which equation is equivalent to √x^2+81 = x+10
jeka57 [31]

Keywords:

<em>equation, operations, equivalent, binomial, square root </em>

For this case we have an equation in which we must apply operations to rewrite it in an equivalent way. We must start by raising both sides of the equation to the square. Thus, we eliminate the square root of the left side of equality and finally solve the binomial of the right side of equality.

So we have:

\sqrt {x ^ 2 + 81} = x + 10\\(\sqrt {x ^ 2 + 81}) ^ 2 = (x + 10) ^ 2\\x ^ 2 + 81 = (x + 10) ^ 2

By definition:(a + b) ^ 2 = a ^ 2 + 2ab + b ^ 2

x ^ 2 + 81 = x ^ 2 + 2 (x) (10) + (10) ^ 2\\x ^ 2 + 81 = x ^ 2 + 20x +100

Thus, x ^ 2 + 81 = x ^ 2 + 20x +100 is equivalent to \sqrt {x ^ 2 + 81} = x + 10

Answer:

x ^ 2 + 81 = x ^ 2 + 20x +100

Option D

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3 years ago
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Last question please help me!!!!!!!
Sindrei [870]

Answer:

it's D

Step-by-step explanation:

i just put it into desmos and looked for points, none of the answers appeared, therefore it's D

3 0
3 years ago
Angle b and Angle g are known as alternate ___________ angles.
Afina-wow [57]
Alternate exterior angles because the are OUTSIDE of the parallel lines
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Karla has $4.60 in nickles and quarters . she has a total of 36 coins. how many nickels does she have
butalik [34]
There are 22 nickels.

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3 years ago
GEOMETRY HELP WILL MARK BRAINLIEST
alisha [4.7K]

Answer:

x=8

z = 115

Step-by-step explanation:

65 and 13x - 39 are vertical angles so they are equal

65 = 13x - 39

Add 39 to each side

65+39 = 13x - 39+39

104 = 13x

Divide each side by 13

104/13 = 13x/13

8 =x

65 and z are supplementary angles because they form a straight line.  This means they add to 180

65+z = 180

Subtract 65 from each side

65+z-65 = 180-65

z = 115

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3 years ago
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