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3 years ago

I need help ASAP please and thank you

Mathematics

1 answer:

Pavel [41]3 years ago

7 0

9514 1404 393

Answer:

C. 4 +√(x+5)

Step-by-step explanation:

The sign between the terms changes to form the conjugate. The radical contents are unchanged.

The conjugate of 4 -√(x+5) is 4 +√(x+5).

_____

<em>Additional comment</em>

The utility of a conjugate is that the product of a number and its conjugate is the difference of two squares. The squares are intended to remove an undesirable feature of the number, its imaginary part or its irrational part, for example. Here, the product of the number and its conjugate would be ...

(a -b)(a +b) = a² -b²

4² -(√(x+5))² = 16 -(x +5) = 11 -x . . . . no longer contains a root

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3 years ago

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3 years ago

Explain how to determine the zeros of f(x)=(x+3)(x-1)(x-8)

spin [16.1K]

Answer:

x=-3, x=1, x=8

Step-by-step explanation:

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If you have to find the zero of an equation like f(x)=-2x^2 - 5x + 7 then you would have to factor the equation.

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3 years ago

Read 2 more answers

a fish is 73 feet below sea level. It then swims 14 feet toward the surface. How many feet below sea level is the fish how?

baherus [9]

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4 years ago

Read 2 more answers

PLEEAASE HELP MEEEEEE

Gre4nikov [31]

$\mathsf{1.\; \frac{x - 6}{2} = x + 13}$

⇒ x - 6 = 2x + 26

⇒ x = -32

⇒ This Equation has One Solution

So, It matches with A in Column B

2. 2 + 6x - 7 = 8 + 2x - 10 + 4x

⇒ 6x - 5 = 6x - 2

As, They are Equations of Parallel Lines. They never meet each other.

⇒ This Equation has No Solution

⇒ So, It matches with B in Column B

3. 15x + 25 = 15x + 10

As, They are Equations of Parallel Lines. They never meet each other.

⇒ This Equation has No Solution

⇒ So, It matches with B in Column B

4. 16 + 8x = 4(2x + 4)

⇒ 16 + 8x = 16 + 8x

As, Both Equations are Same. They Represent the Same Line.

⇒ This Equation has Infinite Number of Solutions

⇒ So, It matches with C in Column B

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3 years ago