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2 years ago

Help I dont understand how to do this

Mathematics

1 answer:

Bezzdna [24]2 years ago

5 0

the formula for circumstance of a circle is:

C= 2×pi×r or C= pi×d (the diameter actually consists of 2 radiuses)

C= pi×7

≈21.99

C= 2×pi×9

=18×pi

≈56.55

C= 2×pi×5

=10×pi

≈31.42

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sergeinik [125]

Answer:

[4, -1]

Step-by-step explanation:

Using the Elimination Method:

3x + y = 11

5x - y = 21

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x = 4 [Plug this back into both equations to get the y-coordinate of -1]; -1 = y

The y's are already additive inverses [result in 0], canceling each other out.

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3 years ago

Which statement must be true? a b c d

lozanna [386]

ANSWER

$\boxed {m \ne0}$

EXPLANATION

The given function is

$f(x) = mx + b$

We need to find the inverse of this function,

Let

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We interchange x an y to obtain,

$x = my + b$

We solve for y now to obtain,

$x - b = my$

We divide through by m to get,

$\frac{x - b}{m} = y$

Hence the inverse function is ,

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For this inverse to exist, the denominator must not be equal to zero,

Thus

$m \ne0$

The correct answer is A.

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