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2 years ago

There is a bag filled with 4 blue and 5 red marbles.

Mathematics

2 answers:

marishachu [46]2 years ago

6 0

7 out of 9 , 7:9, 7/9

because 4+5=9
9-2= 7

Alexus [3.1K]2 years ago

6 0

Answer:

8/18

Step-by-step explanation:

the probability of the marble being red is 5/9 and it being blue is 4/9

so the probability of it being a blue marble two times is

4/9 + 4/9

8/18

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Question 1) Function defining the table:

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Therefore the function is

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We expand to get:

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The standard form is:

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Question 3) Parabola opening up

The x-intercepts are x=3 and x=7

The factors are (x-3), (x-7)

The factored from is

$y = a(x - 3)(x - 7)$

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The equation is:

$y = (x - 3)(x + 7)$

Expand:

$y = {x}^{2} + 7x - 3x - 21$

$y = {x}^{2} + 4x - 21$

This is the standard form:

Question 3) Parabola opening down:

The x-intercepts are x=-5 and x=1

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The factored form is

$y = - (x + 5)(x - 1)$

We expand to get:

$y = - ( {x}^{2} - x + 5x - 5)$

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This is the standard form.

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