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siniylev [52]
3 years ago
6

Task 2

Mathematics
1 answer:
Liono4ka [1.6K]3 years ago
6 0

Step-by-step explanation:

For a quadratic expression ax²+bx + c = 0

The discriminant D = b²-4ac

Given the following quadratic equation;

x^2 - 6x-27 = 0

a = 1, b = -6, c = -27

D = (-6)²-4(-27)

D = 36+108

D = 144

Hence the discriminant is 144

For the roots;

x = -b±√D/2a

x = 6±√144/2

x = 6±12/2

x = 18/2 and -6/2

x = 9 and -3

For the expression x2 - 25 = 0

a = 1, b = 0 and c = -25

D = (0)²-4(-25)

D = 100

Hence the discriminant is 100

For the roots;

x = 0±√100/2

x = ±10/2

x = ±5

x =-5 and 5

Given the following quadratic equation;

x^2 +10x+25 = 0

a = 1, b = 10, c = 25

D = (10)²-4(25)

D = 100-100

D = 0

Hence the discriminant is 0

For the roots

x = -10±√0/2

x = -10/2

x = -5

Given the following quadratic equation;

2x^2 - 5x+3 = 0

a = 2, b = -5, c = 3

D = (-5)²-4(2)(3)

D = 25-24

D = 1

Hence the discriminant is 1

For the roots;

x = 5±√1/2(2)

x = 5±1/4

x = 5+1/4 and 5-1/4

x = 6/4 and 4/4

x = 3/2 and 1

x = 18/2 and -6/2

x = 9 and -3

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Answer:

here I'm confused that whether the selling price is Rs.9,200 or Rs.9.200

any ways you can take the help of below procedure

Step-by-step explanation:

here,

let marked price be X

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SP= MP - D of MP

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8 0
3 years ago
a rectangle is 4 centimeters longer than it is wide. the area is 117 square centimeters. find the dimensions of the rectangle
vekshin1

Answer:

  • width: 9 cm
  • length: 13 cm

Step-by-step explanation:

Integer factors of 117 include ...

... 117 = 1×117 = 3×39 ≈ 9×13

The last factor pair is two factors that differ by 4. We can take these to be the dimensions of the rectangle.

_____

If you want to write an equation for width (w), it might be ...

... w(w+4) = 117

... w² +4w -117 = 0

The factorization problem for this quadratic is the problem of finding two factors of 117 that differ by 4. That is what we have done, above.

If you want to solve this by completing the square, you can to this:

... w² +4w = 117

... w² +4w +4 = 121 . . . . . add 4 = (4/2)² to complete the square

... (w+2)² = 121

... w + 2 = ±√121 = ±11 . . . . take the square root

... w = -2 ± 11 . . . . . we're only interested in the positive solution

... w = 9, then w+4 = 13 and the dimensions are 9 cm by 13 cm.

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3 years ago
Use one method to find the LCM of the first set of numbers below. Use the other method to find the LCM of the second set. Show W
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Answer:

The least common multiple (LCM) of two or more non-zero whole numbers is the smallest whole number that is divisible by each of those numbers. In other words, the LCM is the smallest number that all of the numbers divide into evenly.

Step-by-step explanation:

The LCM of 13 AND 17 is 221

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Answer:

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Step-by-step explanation:

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From the question, the center of the hyperbola is

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c is the distance between the center to foci, which is -2 or 2.

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Hence the answer is

\frac{x^2}{1}-\frac{y^2}{3}=1

5 0
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