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wlad13 [49]
1 year ago
5

Can someone help me solve these problems?

Mathematics
1 answer:
Sonja [21]1 year ago
4 0

Answer:

2. A is false

   B is false

   C is false

   D is true

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If x=3+root8 and y =3- root 8 find 1/x^2+1/y^2
KonstantinChe [14]

Answer:

34

Step-by-step explanation:

x=3+√8

y =3-√8

now,

1/x^2+1/y^2

=1/(3+√8)² + 1/(3-√8)²

= [(3-√8)²+(3+√8)²] / (3+√8)²(3-√8)²            [L.C.M  = (3+√8)²(3-√8)² ]

=[(3-√8+3+√8)²-2(3-√8)(3+√8) ] / [(3+√8)(3-√8)]²  

=[6²-2.(3²-√8² )] / (3²-√8²)²                 [ a²+ b²=(a+b)²-2ab]

=[36-2(9-8) ]/ (9-8)²

=[36-2.1] / 1²

=34

3 0
3 years ago
I really appreciate all the help guys<3
Tems11 [23]

Answer:

2.4

Step-by-step explanation:

6 0
3 years ago
Justin used 3/4 of a gallon of paint on 3/4 of a wall. How many gallons does he need for one wall?
blondinia [14]

Answer:

Step-by-step explanation:

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liberstina [14]

Answer:

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Because it has to be lower than $400 and higher than $10

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2 years ago
Solving Linear equations 25 =x + 19
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Steps to solve:

25 = x + 19

~Subtract 19 to both sides

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Best of Luck!

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3 years ago
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