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3 years ago

What's a real number?

Mathematics

2 answers:

Afina-wow [57]3 years ago

8 0

Answer:

Real Numbers are numerical values that can represent distance on a line. An example of it being one is 15 and an example of it NOT being one is ∞.

aksik [14]3 years ago

4 0

Answer:

number 1 is a real number and 2 and 3 and 4 and 5 and 6 and 7 and 8 and 9

Step-by-step explanation:

a real number is a value of a continuous quantity that can represent a distance along a line.

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What is the gradient of the blue line????<br> help please

Maru [420]

Answer:

-5

Step-by-step explanation:

gradient = change in y ÷ change in x

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2 years ago

fine the equation of the line that goes through the point (2,-9) that is parallel to the line with equation y=-3/4x

Andre45 [30]

Answer:

y=6x

Step-by-step explanation:

g=-9/2

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2 years ago

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Oduvanchick [21]

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3 years ago

What are the real zeros of x^3+4x^2-9x-36

Katyanochek1 [597]

Answer:

$x = -4\\x = -3\\x = 3$

Step-by-step explanation:

To find the real zeros you must match the function to zero and factor the expression.

We have a polynomial of degree 3.

We try to group the terms to perform the factorization

$x ^ 3 + 4x ^ 2-9x-36 = 0\\\\x ^ 2(x + 4) - 9(x + 4) = 0$

Now we take (x + 4) as a common factor

$(x + 4)(x ^ 2 -9) = 0$

If we have an expression of the form $(a ^ 2-b ^ 2)$ we know that this expression is equivalent to:

$(a ^ 2-b ^ 2) = (a + b)(a-b)$

In this case

$a = x\\b = 3$

So:

$(x ^ 2 -9) = (x + 3)(x-3)$

Finally:

$x ^ 3 + 4x ^ 2-9x-36 = (x + 4)(x + 3)(x-3) = 0$

The solutions are:

$x = -4\\x = -3\\x = 3$

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3 years ago

(x, y) ----> (x + 2, y - 3) please help this is my final

ipn [44]

slide right 2 and down 3

OPTION B is the correct answer.

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3 years ago